diff --git a/Makefile b/Makefile
index e759e31f0..f73541285 100644
--- a/Makefile
+++ b/Makefile
@@ -402,6 +402,15 @@ $(SRCS):					\
 	libc/integral/lp64arg.inc		\
 	libc/integral/lp64.inc
 
+.PHONY: toolchain
+toolchain:	o/cosmopolitan.h				\
+		o/$(MODE)/ape/public/ape.lds			\
+		o/$(MODE)/libc/crt/crt.o			\
+		o/$(MODE)/ape/ape.o				\
+		o/$(MODE)/ape/ape-copy-self.o			\
+		o/$(MODE)/ape/ape-no-modify-self.o		\
+		o/$(MODE)/cosmopolitan.a
+
 # UNSPECIFIED PREREQUISITES TUTORIAL
 #
 # A build rule must exist for all files that make needs to consider in
diff --git a/examples/forkrand.c b/examples/forkrand.c
index 18aad3392..9a02e2a5b 100644
--- a/examples/forkrand.c
+++ b/examples/forkrand.c
@@ -9,19 +9,12 @@
 #endif
 #include "libc/calls/calls.h"
 #include "libc/log/check.h"
-#include "libc/log/log.h"
-#include "libc/nt/nt/process.h"
-#include "libc/mem/gc.h"
-#include "libc/runtime/memtrack.internal.h"
-#include "libc/runtime/runtime.h"
 #include "libc/stdio/rand.h"
 #include "libc/stdio/stdio.h"
-#include "libc/time/time.h"
-#include "libc/x/x.h"
 
 dontinline void dostuff(const char *s) {
   int i, us;
-  srand(rand64()); /* seeds rand() w/ intel rdrnd, auxv, etc. */
+  srand(_rand64()); /* seeds rand() w/ intel rdrnd, auxv, etc. */
   for (i = 0; i < 5; ++i) {
     us = rand() % 500000;
     usleep(us);
diff --git a/examples/getrandom.c b/examples/getrandom.c
index e60a1b174..baf8df0ce 100644
--- a/examples/getrandom.c
+++ b/examples/getrandom.c
@@ -102,7 +102,7 @@ uint64_t rngset64(void) {
   static unsigned i;
   static uint64_t s;
   if (!i) {
-    s = rand64();
+    s = _rand64();
     i = (s + 1) & (511);
   }
   return MarsagliaXorshift64(&s);
@@ -215,7 +215,7 @@ const struct Function {
     {"moby", moby},              //
     {"mt19937", _mt19937},       //
     {"python", pythonx2},        //
-    {"rand64", rand64},          //
+    {"rand64", _rand64},         //
     {"rdrand", rdrand},          //
     {"rdrnd", rdrand},           //
     {"rdseed", rdseed},          //
diff --git a/libc/calls/tmpfd.c b/libc/calls/tmpfd.c
index 26ae7f7ea..083595b47 100644
--- a/libc/calls/tmpfd.c
+++ b/libc/calls/tmpfd.c
@@ -86,7 +86,7 @@ int tmpfd(void) {
     *p++ = '.';
   }
   for (i = 0; i < 10; ++i) {
-    x = rand64();
+    x = _rand64();
     for (j = 0; j < 6; ++j) {
       p[j] = "0123456789abcdefghijklmnopqrstuvwxyz"[x % 36];
       x /= 36;
diff --git a/libc/dns/resolvedns.c b/libc/dns/resolvedns.c
index 4606ecb16..bf83c3669 100644
--- a/libc/dns/resolvedns.c
+++ b/libc/dns/resolvedns.c
@@ -63,7 +63,7 @@ int ResolveDns(const struct ResolvConf *resolvconf, int af, const char *name,
   if (!resolvconf->nameservers.i) return 0;
   bzero(&h, sizeof(h));
   rc = ebadmsg();
-  h.id = rand64();
+  h.id = _rand64();
   h.bf1 = 1; /* recursion desired */
   h.qdcount = 1;
   q.qname = name;
diff --git a/libc/dns/resolvednsreverse.c b/libc/dns/resolvednsreverse.c
index 4f8b08f8c..5709d1a5e 100644
--- a/libc/dns/resolvednsreverse.c
+++ b/libc/dns/resolvednsreverse.c
@@ -24,17 +24,17 @@
 │ ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR        │
 │ OTHER DEALINGS IN THE SOFTWARE.                                              │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/intrin/bits.h"
 #include "libc/calls/calls.h"
 #include "libc/dns/consts.h"
 #include "libc/dns/dns.h"
 #include "libc/dns/dnsheader.h"
 #include "libc/dns/dnsquestion.h"
 #include "libc/dns/resolvconf.h"
+#include "libc/intrin/bits.h"
 #include "libc/mem/mem.h"
-#include "libc/stdio/rand.h"
 #include "libc/runtime/runtime.h"
 #include "libc/sock/sock.h"
+#include "libc/stdio/rand.h"
 #include "libc/str/str.h"
 #include "libc/sysv/consts/af.h"
 #include "libc/sysv/consts/ipproto.h"
@@ -65,7 +65,7 @@ int ResolveDnsReverse(const struct ResolvConf *resolvconf, int af,
   if (!resolvconf->nameservers.i) return 0;
   bzero(&h, sizeof(h));
   rc = ebadmsg();
-  h.id = rand64();
+  h.id = _rand64();
   h.bf1 = 1; /* recursion desired */
   h.qdcount = 1;
   q.qname = name;
diff --git a/libc/intrin/getpid.c b/libc/intrin/getpid.c
index badabd355..94b0fb4f1 100644
--- a/libc/intrin/getpid.c
+++ b/libc/intrin/getpid.c
@@ -29,7 +29,7 @@
  * tracked by a global variable which is updated at fork(). The only
  * exception is when the process is vfork()'d in which case a system
  * call shall be issued. This optimization helps make functions like
- * rand64() fork-safe, however it could lead to race conditions in
+ * _rand64() fork-safe, however it could lead to race conditions in
  * programs that mix fork() with threads. In that case, apps should
  * consider using `sys_getpid().ax` instead to force a system call.
  *
diff --git a/libc/intrin/rand64.c b/libc/intrin/rand64.c
index 24aa0e691..97ef4e875 100644
--- a/libc/intrin/rand64.c
+++ b/libc/intrin/rand64.c
@@ -46,7 +46,7 @@ static struct {
  * @threadsafe
  * @vforksafe
  */
-uint64_t rand64(void) {
+uint64_t _rand64(void) {
   void *p;
   uint128_t s;
   if (__threaded) pthread_spin_lock(&g_rand64.lock);
diff --git a/libc/stdio/lemur64.c b/libc/stdio/lemur64.c
index a28536475..a3a77c5ee 100644
--- a/libc/stdio/lemur64.c
+++ b/libc/stdio/lemur64.c
@@ -29,7 +29,7 @@
  *     double x = _real1(lemur64());  // make float on [0,1]-interval
  *
  * If you want a fast pseudorandom number generator that seeds itself
- * automatically on startup and fork() then consider rand64(). If you
+ * automatically on startup and fork(), then consider _rand64. If you
  * want true random data then consider rdseed, rdrand, and getrandom.
  *
  * @return 64 bits of pseudorandom data
@@ -37,7 +37,7 @@
  * @note this function takes at minimum 1 cycle
  * @note this function passes bigcrush and practrand
  * @note this function is not intended for cryptography
- * @see rand64(), rngset(), _real1(), _real2(), _real3()
+ * @see _rand64(), rngset(), _real1(), _real2(), _real3()
  */
 uint64_t lemur64(void) {
   static uint128_t s = 2131259787901769494;
diff --git a/libc/stdio/mkdtemp.c b/libc/stdio/mkdtemp.c
index 1a62f15e6..b8fcf1b0d 100644
--- a/libc/stdio/mkdtemp.c
+++ b/libc/stdio/mkdtemp.c
@@ -42,7 +42,7 @@ char *mkdtemp(char *template) {
   int i, j, n;
   if ((n = strlen(template)) >= 6 && !memcmp(template + n - 6, "XXXXXX", 6)) {
     for (i = 0; i < 10; ++i) {
-      x = rand64();
+      x = _rand64();
       for (j = 0; j < 6; ++j) {
         template[n - 6 + j] = "0123456789abcdefghijklmnopqrstuvwxyz"[x % 36];
         x /= 36;
diff --git a/libc/stdio/mkostempsm.c b/libc/stdio/mkostempsm.c
index 8b74f47a2..61c58f437 100644
--- a/libc/stdio/mkostempsm.c
+++ b/libc/stdio/mkostempsm.c
@@ -77,7 +77,7 @@ static uint64_t g_mkostemps_reseed;
 dontdiscard int mkostempsm(char *template, int suffixlen, unsigned flags,
                            int mode) {
   int fd;
-  if (g_mkostemps_reseed++ % RESEED == 0) g_mkostemps_rand = rand64();
+  if (g_mkostemps_reseed++ % RESEED == 0) g_mkostemps_rand = _rand64();
   fd = mkostempsmi(template, suffixlen, flags, &g_mkostemps_rand, mode, open);
   STRACE("mkostempsm([%#s], %'d, %#x, %#o) → %d% m", template, suffixlen, flags,
          mode, fd);
diff --git a/libc/stdio/rand.c b/libc/stdio/rand.c
index edbad3b26..fb4800833 100644
--- a/libc/stdio/rand.c
+++ b/libc/stdio/rand.c
@@ -35,7 +35,7 @@
  *
  * @note this function does well on bigcrush and practrand
  * @note this function is not intended for cryptography
- * @see lemur64(), rand64(), rdrand()
+ * @see lemur64(), _rand64(), rdrand()
  */
 int rand(void) {
   return KnuthLinearCongruentialGenerator(&g_rando) >> 33;
diff --git a/libc/stdio/rand.h b/libc/stdio/rand.h
index 48cf0824c..8e0ebffbf 100644
--- a/libc/stdio/rand.h
+++ b/libc/stdio/rand.h
@@ -23,7 +23,7 @@ long random(void);
 void srandom(unsigned);
 
 uint64_t lemur64(void);
-uint64_t rand64(void);
+uint64_t _rand64(void);
 uint64_t vigna(void);
 uint64_t vigna_r(uint64_t[hasatleast 1]);
 void svigna(uint64_t);
diff --git a/libc/stdio/rdrand.c b/libc/stdio/rdrand.c
index 7b588cd74..d55fa10fb 100644
--- a/libc/stdio/rdrand.c
+++ b/libc/stdio/rdrand.c
@@ -16,8 +16,8 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/intrin/asmflag.h"
 #include "libc/errno.h"
+#include "libc/intrin/asmflag.h"
 #include "libc/nexgen32e/x86feature.h"
 #include "libc/stdio/rand.h"
 #include "libc/sysv/consts/grnd.h"
@@ -38,7 +38,7 @@ static dontinline uint64_t rdrand_failover(void) {
         r = 0;
         f = 0;
       } else {
-        return rand64();
+        return _rand64();
       }
     }
   }
@@ -59,7 +59,7 @@ static dontinline uint64_t rdrand_failover(void) {
  * @note this function could block a nontrivial time on old computers
  * @note this function is indeed intended for cryptography
  * @note this function takes around 300 cycles
- * @see rngset(), rdseed(), rand64()
+ * @see rngset(), rdseed(), _rand64()
  * @asyncsignalsafe
  * @vforksafe
  */
diff --git a/libc/stdio/rdseed.c b/libc/stdio/rdseed.c
index 3ffe033ec..e68612ce1 100644
--- a/libc/stdio/rdseed.c
+++ b/libc/stdio/rdseed.c
@@ -34,7 +34,7 @@
  * @note this function could block a nontrivial time on old computers
  * @note this function is indeed intended for cryptography
  * @note this function takes around 800 cycles
- * @see rngset(), rdrand(), rand64()
+ * @see rngset(), rdrand(), _rand64()
  * @asyncsignalsafe
  * @vforksafe
  */
diff --git a/libc/stdio/vigna.c b/libc/stdio/vigna.c
index 5aeb30253..92c26e178 100644
--- a/libc/stdio/vigna.c
+++ b/libc/stdio/vigna.c
@@ -46,7 +46,7 @@ static uint64_t g_vigna;
  *     rngset(buf, sizeof(buf), vigna, 0);
  *
  * If you want a fast pseudorandom number generator that seeds itself
- * automatically on startup and fork() then consider rand64(). If you
+ * automatically on startup and fork(), then consider _rand64. If you
  * want true random data then consider rdseed, rdrand, and getrandom.
  *
  * @return 64 bits of pseudorandom data
diff --git a/test/dsp/core/scalevolume_test.c b/test/dsp/core/scalevolume_test.c
index 11a646480..d4172fe03 100644
--- a/test/dsp/core/scalevolume_test.c
+++ b/test/dsp/core/scalevolume_test.c
@@ -22,8 +22,8 @@
 #include "libc/log/check.h"
 #include "libc/macros.internal.h"
 #include "libc/nexgen32e/x86feature.h"
-#include "libc/stdio/rand.h"
 #include "libc/runtime/buffer.internal.h"
+#include "libc/stdio/rand.h"
 #include "libc/testlib/ezbench.h"
 #include "libc/testlib/testlib.h"
 
@@ -146,7 +146,7 @@ TEST(scalevolume, testSmallestScale_justSaturates) {
 //   - ~200ns w/ -O3 -march=skylake MODE=rel
 
 void randomizeaudio(void) {
-  rngset(pcm, sizeof(pcm), rand64, -1);
+  rngset(pcm, sizeof(pcm), _rand64, -1);
 }
 
 void scalevolume_pure(int amt) {
diff --git a/test/dsp/tty/ttymove_test.c b/test/dsp/tty/ttymove_test.c
index a52b435b3..47369a746 100644
--- a/test/dsp/tty/ttymove_test.c
+++ b/test/dsp/tty/ttymove_test.c
@@ -27,7 +27,7 @@ char p[16];
 struct TtyCursor c;
 
 void SetUp(void) {
-  rngset(p, sizeof(p), rand64, -1);
+  rngset(p, sizeof(p), _rand64, -1);
 }
 
 TEST(ttymove, sameCoord_doesNothing) {
diff --git a/test/libc/calls/reservefd_test.c b/test/libc/calls/reservefd_test.c
index 0d958625f..3383fc776 100644
--- a/test/libc/calls/reservefd_test.c
+++ b/test/libc/calls/reservefd_test.c
@@ -95,7 +95,7 @@ int Worker(void *p, int tid) {
   int i, rc, fd;
   for (i = 0; i < 64; ++i) {
     ASSERT_NE(-1, (fd = open("/zip/libc/testlib/hyperion.txt", O_RDONLY)));
-    usleep(rand64() % 100);
+    usleep(_rand64() % 100);
     for (;;) {
       rc = read(fd, buf, 64);
       if (rc != -1) {
diff --git a/test/libc/calls/setrlimit_test.c b/test/libc/calls/setrlimit_test.c
index 5f8786256..bc4b0d6bf 100644
--- a/test/libc/calls/setrlimit_test.c
+++ b/test/libc/calls/setrlimit_test.c
@@ -101,7 +101,7 @@ TEST(setrlimit, testFileSizeLimit) {
              firstnonnull(getenv("TMPDIR"), "/tmp"),
              firstnonnull(program_invocation_short_name, "unknown"), getpid());
     ASSERT_NE(-1, (fd = open(tmpname, O_RDWR | O_CREAT | O_TRUNC, 0644)));
-    rngset(junkdata, 512, rand64, -1);
+    rngset(junkdata, 512, _rand64, -1);
     for (i = 0; i < 5 * 1024 * 1024 / 512; ++i) {
       ASSERT_EQ(512, write(fd, junkdata, 512));
     }
@@ -143,7 +143,7 @@ TEST(setrlimit, testMemoryLimit) {
         ASSERT_EQ(ENOMEM, errno);
         _exit(0);
       }
-      rngset(p, PAGESIZE, rand64, -1);
+      rngset(p, PAGESIZE, _rand64, -1);
     }
     _exit(1);
   }
@@ -171,7 +171,7 @@ TEST(setrlimit, testVirtualMemoryLimit) {
         ASSERT_EQ(ENOMEM, errno);
         _exit(0);
       }
-      rngset(p, PAGESIZE, rand64, -1);
+      rngset(p, PAGESIZE, _rand64, -1);
     }
     _exit(1);
   }
@@ -201,7 +201,7 @@ TEST(setrlimit, testDataMemoryLimit) {
         ASSERT_EQ(ENOMEM, errno);
         _exit(0);
       }
-      rngset(p, PAGESIZE, rand64, -1);
+      rngset(p, PAGESIZE, _rand64, -1);
     }
     _exit(1);
   }
diff --git a/test/libc/dns/dnsheader_test.c b/test/libc/dns/dnsheader_test.c
index 712c1031e..782484e34 100644
--- a/test/libc/dns/dnsheader_test.c
+++ b/test/libc/dns/dnsheader_test.c
@@ -18,9 +18,9 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/dns/dns.h"
 #include "libc/dns/dnsheader.h"
+#include "libc/mem/gc.internal.h"
 #include "libc/mem/mem.h"
 #include "libc/stdio/rand.h"
-#include "libc/mem/gc.internal.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
 #include "libc/testlib/testlib.h"
@@ -39,8 +39,8 @@ TEST(SerializeDnsHeader, test) {
 TEST(SerializeDnsHeader, fuzzSymmetry) {
   uint8_t buf[12];
   struct DnsHeader in, out;
-  rngset(&in, sizeof(in), rand64, -1);
-  rngset(&out, sizeof(out), rand64, -1);
+  rngset(&in, sizeof(in), _rand64, -1);
+  rngset(&out, sizeof(out), _rand64, -1);
   SerializeDnsHeader(buf, &in);
   DeserializeDnsHeader(&out, buf);
   ASSERT_EQ(0, memcmp(&in, &out, 12), "%#.*s\n\t%#.*s", 12, in, 12, buf);
diff --git a/test/libc/intrin/intrin_test.c b/test/libc/intrin/intrin_test.c
index 98d088f58..7a205ba4b 100644
--- a/test/libc/intrin/intrin_test.c
+++ b/test/libc/intrin/intrin_test.c
@@ -101,10 +101,10 @@
 #include "libc/intrin/pxor.h"
 #include "libc/limits.h"
 #include "libc/log/check.h"
+#include "libc/mem/gc.internal.h"
 #include "libc/nexgen32e/kcpuids.h"
 #include "libc/stdio/lcg.internal.h"
 #include "libc/stdio/rand.h"
-#include "libc/mem/gc.internal.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
 #include "libc/testlib/ezbench.h"
@@ -2105,8 +2105,8 @@ TEST(pdep, fuzz) {
   int i;
   uint64_t x, y;
   for (i = 0; i < 1000; ++i) {
-    x = rand64();
-    y = rand64();
+    x = _rand64();
+    y = _rand64();
     ASSERT_EQ(pdep(x, y), (pdep)(x, y));
   }
 }
@@ -2115,8 +2115,8 @@ TEST(pext, fuzz) {
   int i;
   uint64_t x, y;
   for (i = 0; i < 1000; ++i) {
-    x = rand64();
-    y = rand64();
+    x = _rand64();
+    y = _rand64();
     ASSERT_EQ(pext(x, y), (pext)(x, y));
   }
 }
diff --git a/test/libc/intrin/memcmp_test.c b/test/libc/intrin/memcmp_test.c
index 44404786c..230e6be30 100644
--- a/test/libc/intrin/memcmp_test.c
+++ b/test/libc/intrin/memcmp_test.c
@@ -16,9 +16,9 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/mem/gc.internal.h"
 #include "libc/mem/mem.h"
 #include "libc/stdio/rand.h"
-#include "libc/mem/gc.internal.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
 #include "libc/testlib/ezbench.h"
@@ -65,7 +65,7 @@ TEST(memcmp, fuzz) {
   int i, o, n, g;
   char a[256], b[256];
   for (i = 0; i < 100000; ++i) {
-    rngset(a, sizeof(a), rand64, -1);
+    rngset(a, sizeof(a), _rand64, -1);
     memcpy(b, a, sizeof(a));
     if (rand() & 1) {
       a[rand() % sizeof(a)] += rand();
diff --git a/test/libc/intrin/rand64_test.c b/test/libc/intrin/rand64_test.c
index 45ada3724..ed0ca88cf 100644
--- a/test/libc/intrin/rand64_test.c
+++ b/test/libc/intrin/rand64_test.c
@@ -44,7 +44,7 @@ void OnChld(int sig) {
 }
 
 dontinline void Generate(int i) {
-  A[i] = rand64();
+  A[i] = _rand64();
 }
 
 int Thrasher(void *arg, int tid) {
@@ -56,11 +56,11 @@ int Thrasher(void *arg, int tid) {
   return 0;
 }
 
-TEST(rand64, testLcg_doesntProduceIdenticalValues) {
+TEST(_rand64, testLcg_doesntProduceIdenticalValues) {
   int i, j;
   bzero(A, sizeof(A));
   for (i = 0; i < ARRAYLEN(A); ++i) {
-    A[i] = rand64();
+    A[i] = _rand64();
   }
   for (i = 0; i < ARRAYLEN(A); ++i) {
     EXPECT_NE(0, A[i], "i=%d", i);
@@ -71,7 +71,7 @@ TEST(rand64, testLcg_doesntProduceIdenticalValues) {
   }
 }
 
-TEST(rand64, testThreadSafety_doesntProduceIdenticalValues) {
+TEST(_rand64, testThreadSafety_doesntProduceIdenticalValues) {
   int i, j, rc, ws;
   sigset_t ss, oldss;
   struct sigaction oldsa;
diff --git a/test/libc/intrin/strlen_test.c b/test/libc/intrin/strlen_test.c
index 374ebc647..5a5452d19 100644
--- a/test/libc/intrin/strlen_test.c
+++ b/test/libc/intrin/strlen_test.c
@@ -114,7 +114,7 @@ TEST(strlen, fuzz) {
   char *b;
   size_t n, n1, n2;
   for (n = 2; n < 1026; ++n) {
-    b = rngset(calloc(1, n), n - 1, rand64, -1);
+    b = rngset(calloc(1, n), n - 1, _rand64, -1);
     n1 = strlen(b);
     n2 = strlen_pure(b);
     ASSERT_EQ(n1, n2, "%#.*s", n, b);
diff --git a/test/libc/mem/djbsort_test.c b/test/libc/mem/djbsort_test.c
index e419a09fb..cc5995273 100644
--- a/test/libc/mem/djbsort_test.c
+++ b/test/libc/mem/djbsort_test.c
@@ -101,10 +101,10 @@ static int CompareInt(const void *a, const void *b) {
 BENCH(djbsort, bench) {
   n = 256;
   a = _gc(memalign(32, n * 4));
-  EZBENCH2("insertionsort[255]", rngset(a, n * 4, rand64, -1),
+  EZBENCH2("insertionsort[255]", rngset(a, n * 4, _rand64, -1),
            insertionsort(a, n));
-  EZBENCH2("djbsort[255]", rngset(a, n * 4, rand64, -1), djbsort(a, n));
-  EZBENCH2("_intsort[255]", rngset(a, n * 4, rand64, -1), _intsort(a, n));
-  EZBENCH2("qsort[255]", rngset(a, n * 4, rand64, -1),
+  EZBENCH2("djbsort[255]", rngset(a, n * 4, _rand64, -1), djbsort(a, n));
+  EZBENCH2("_intsort[255]", rngset(a, n * 4, _rand64, -1), _intsort(a, n));
+  EZBENCH2("qsort[255]", rngset(a, n * 4, _rand64, -1),
            qsort(a, n, sizeof(int), CompareInt));
 }
diff --git a/test/libc/nexgen32e/memmove_test.c b/test/libc/nexgen32e/memmove_test.c
index 9fdb0434a..b348e0f9a 100644
--- a/test/libc/nexgen32e/memmove_test.c
+++ b/test/libc/nexgen32e/memmove_test.c
@@ -42,7 +42,7 @@ TEST(MemMove, overlapping) {
   for (i = 0; i < N; i += S) {
     for (j = 0; j < N; j += S) {
       for (n = MIN(N - i, N - j) + 1; n--;) {
-        b0 = rngset(malloc(N), N, rand64, -1);
+        b0 = rngset(malloc(N), N, _rand64, -1);
         b1 = memcpy(malloc(N), b0, N);
         b2 = memcpy(malloc(N), b0, N);
         ASSERT_EQ(b1 + j, memmove(b1 + j, b1 + i, n));
@@ -66,7 +66,7 @@ TEST(MemCpy, overlapping) {
     for (j = 0; j < N; j += S) {
       for (n = MIN(N - i, N - j) + 1; n--;) {
         if (j <= i) {
-          b0 = rngset(malloc(N), N, rand64, -1);
+          b0 = rngset(malloc(N), N, _rand64, -1);
           b1 = memcpy(malloc(N), b0, N);
           b2 = memcpy(malloc(N), b0, N);
           ASSERT_EQ(b1 + j, memcpy(b1 + j, b1 + i, n));
@@ -90,7 +90,7 @@ TEST(MemMove, overlappingDirect) {
   for (i = 0; i < N; i += S) {
     for (j = 0; j < N; j += S) {
       for (n = MIN(N - i, N - j) + 1; n--;) {
-        b0 = rngset(malloc(N), N, rand64, -1);
+        b0 = rngset(malloc(N), N, _rand64, -1);
         b1 = memcpy(malloc(N), b0, N);
         b2 = memcpy(malloc(N), b0, N);
         ASSERT_EQ(b1 + j, (memmove)(b1 + j, b1 + i, n));
diff --git a/test/libc/nexgen32e/strcaseconv_test.c b/test/libc/nexgen32e/strcaseconv_test.c
index cfa827af2..bbd280426 100644
--- a/test/libc/nexgen32e/strcaseconv_test.c
+++ b/test/libc/nexgen32e/strcaseconv_test.c
@@ -16,10 +16,10 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/mem/gc.internal.h"
 #include "libc/mem/mem.h"
 #include "libc/nexgen32e/nexgen32e.h"
 #include "libc/stdio/rand.h"
-#include "libc/mem/gc.internal.h"
 #include "libc/str/str.h"
 #include "libc/testlib/ezbench.h"
 #include "libc/testlib/testlib.h"
@@ -56,7 +56,7 @@ BENCH(strtolower, bench) {
   EZBENCH2(
       "strtolower",
       {
-        rngset(data, size, rand64, -1);
+        rngset(data, size, _rand64, -1);
         data[size - 1] = 0;
       },
       strtolower(data));
diff --git a/test/libc/stdio/fwrite_test.c b/test/libc/stdio/fwrite_test.c
index beeed09f0..e8dc45548 100644
--- a/test/libc/stdio/fwrite_test.c
+++ b/test/libc/stdio/fwrite_test.c
@@ -144,7 +144,7 @@ void MeatyReadWriteTest(void) {
   char *mem, *buf;
   n = 8 * 1024 * 1024;
   buf = gc(malloc(n));
-  mem = rngset(gc(malloc(n)), n, rand64, -1);
+  mem = rngset(gc(malloc(n)), n, _rand64, -1);
   ASSERT_NE(NULL, (f = fopen(PATH, "wb")));
   setbuffer(f, gc(malloc(4 * 1000 * 1000)), 4 * 1000 * 1000);
   EXPECT_EQ(n, fwrite(mem, 1, n, f));
diff --git a/test/libc/stdio/getrandom_test.c b/test/libc/stdio/getrandom_test.c
index d274997b8..963831d73 100644
--- a/test/libc/stdio/getrandom_test.c
+++ b/test/libc/stdio/getrandom_test.c
@@ -180,7 +180,7 @@ uint64_t Rand64LowByte(void) {
   uint64_t x;
   for (x = i = 0; i < 8; ++i) {
     x <<= 8;
-    x |= rand64() & 255;
+    x |= _rand64() & 255;
   }
   return x;
 }
@@ -203,7 +203,7 @@ static const struct RandomFunction {
     {"SixthEditionLowByte", SixthEditionLowByte, false},      //
     {"SeventhEditionLowByte", SeventhEditionLowByte, false},  //
     {"KnuthLcg", KnuthLcg, false},                            //
-    {"rand64", rand64, true},                                 //
+    {"rand64", _rand64, true},                                //
     {"Rand64LowByte", Rand64LowByte, true},                   //
     {"GetRandom", GetRandom, true},                           //
 };
diff --git a/test/libc/stdio/mt19937_test.c b/test/libc/stdio/mt19937_test.c
index b20ef21a4..c0df389ce 100644
--- a/test/libc/stdio/mt19937_test.c
+++ b/test/libc/stdio/mt19937_test.c
@@ -16,14 +16,14 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/intrin/bits.h"
 #include "libc/errno.h"
+#include "libc/intrin/bits.h"
 #include "libc/log/check.h"
 #include "libc/macros.internal.h"
-#include "libc/mem/mem.h"
-#include "libc/stdio/rand.h"
 #include "libc/mem/gc.internal.h"
+#include "libc/mem/mem.h"
 #include "libc/runtime/runtime.h"
+#include "libc/stdio/rand.h"
 #include "libc/stdio/stdio.h"
 #include "libc/sysv/consts/grnd.h"
 #include "libc/testlib/ezbench.h"
@@ -157,14 +157,14 @@ TEST(mt19937, test) {
 BENCH(mt19937, bench8) {
   volatile uint64_t x;
   EZBENCH2("lemur64", donothing, x = lemur64());
-  EZBENCH2("rand64", donothing, x = rand64());
+  EZBENCH2("_rand64", donothing, x = _rand64());
   EZBENCH2("vigna", donothing, x = vigna());
   EZBENCH2("vigna_r", donothing, vigna_r(&x));
   EZBENCH2("xorshift", donothing, x = xorshift());
   EZBENCH2("knuth", donothing, x = knuth());
   EZBENCH2("random", donothing, x = urandom());
   EZBENCH2("mt19937", donothing, x = _mt19937());
-  EZBENCH2("rand64char", donothing, x = rand64());
+  EZBENCH2("rand64char", donothing, x = _rand64());
   size_t i = 0;
   volatile uint8_t *p = gc(malloc(3 * 2048 * 2 * 8));
   EZBENCH3("rdrand", 2048, donothing, p[i++] = rdrand());
@@ -174,7 +174,7 @@ BENCH(mt19937, bench8) {
 
 BENCH(mt19937, bench32k) {
   volatile char *p = gc(malloc(32768));
-  EZBENCH_N("rngset(rand64,-1)", 32768, rngset(p, 32768, rand64, -1));
+  EZBENCH_N("rngset(_rand64,-1)", 32768, rngset(p, 32768, _rand64, -1));
   EZBENCH_N("rngset(rdseed,512)", 32768, rngset(p, 32768, rdseed, 512));
   EZBENCH_N("ctrdrbg+rdseed [blk]", 32768, ctrdrbg1(p, 32768));
   EZBENCH_N("getrandom [block]", 32768, GetRandom(p, 32768));
@@ -183,7 +183,7 @@ BENCH(mt19937, bench32k) {
   EZBENCH_N("knuth [word]", 32768, knutha(p, 32768));
   EZBENCH_N("random [word]", 32768, rngset(p, 32768, urandom, 0));
   EZBENCH_N("mt19937 [word]", 32768, rngset(p, 32768, _mt19937, 0));
-  EZBENCH_N("rand64 [word]", 32768, rngset(p, 32768, rand64, 0));
+  EZBENCH_N("_rand64 [word]", 32768, rngset(p, 32768, _rand64, 0));
   EZBENCH_N("rdrand [word]", 32768, rngset(p, 32768, rdrand, 0));
   EZBENCH_N("rdseed [word]", 32768, rngset(p, 32768, rdseed, 0));
 }
diff --git a/test/libc/stdio/rand_test.c b/test/libc/stdio/rand_test.c
index 9af0ac52a..e8188a5c0 100644
--- a/test/libc/stdio/rand_test.c
+++ b/test/libc/stdio/rand_test.c
@@ -39,16 +39,16 @@ TEST(rand003, srandSmokeTest) {
 }
 
 TEST(rand005, rand64SmokeTest) {
-  ASSERT_TRUE(rand64() != rand64() || rand64() != rand64());
+  ASSERT_TRUE(_rand64() != _rand64() || _rand64() != _rand64());
 }
 
-TEST(rand64, test) {
+TEST(_rand64, test) {
   char *p;
   size_t i;
   uint64_t x;
   p = memcpy(malloc(kHyperionSize), kHyperion, kHyperionSize);
   for (i = 0; i < kHyperionSize / 8; ++i) {
-    x = rand64();
+    x = _rand64();
     WRITE64LE(p + i * 8, x);
   }
   free(p);
diff --git a/test/libc/str/blake2_test.c b/test/libc/str/blake2_test.c
index bc669e6e8..2f55e9495 100644
--- a/test/libc/str/blake2_test.c
+++ b/test/libc/str/blake2_test.c
@@ -68,7 +68,7 @@ TEST(BLAKE2B256Test, ABC) {
 
 BENCH(blake2, bench) {
   char fun[256];
-  rngset(fun, 256, rand64, -1);
+  rngset(fun, 256, _rand64, -1);
   EZBENCH_N("blake2b256", 0, EZBLAKE2B256(0, 0));
   EZBENCH_N("blake2b256", 8, EZBLAKE2B256("helloooo", 8));
   EZBENCH_N("blake2b256", 31, EZBLAKE2B256(fun, 31));
diff --git a/test/libc/str/bzero_test.c b/test/libc/str/bzero_test.c
index 7cefb35c7..6aeb6faac 100644
--- a/test/libc/str/bzero_test.c
+++ b/test/libc/str/bzero_test.c
@@ -16,9 +16,9 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/mem/gc.internal.h"
 #include "libc/mem/mem.h"
 #include "libc/stdio/rand.h"
-#include "libc/mem/gc.internal.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
 #include "libc/testlib/ezbench.h"
@@ -30,7 +30,7 @@ TEST(bzero, test) {
   a = gc(malloc(128));
   b = gc(malloc(128));
   for (n = 0; n < 128; ++n) {
-    rngset(a, 128, rand64, -1);
+    rngset(a, 128, _rand64, -1);
     memcpy(b, a, 128);
     bzero(a, n);
     memset(b, 0, n);
diff --git a/test/libc/str/highwayhash64_test.c b/test/libc/str/highwayhash64_test.c
index 681d4d853..0284c8d72 100644
--- a/test/libc/str/highwayhash64_test.c
+++ b/test/libc/str/highwayhash64_test.c
@@ -96,7 +96,7 @@ TEST(highwayhash64, test) {
 
 BENCH(highwayhash64, newbench) {
   char fun[256];
-  rngset(fun, 256, rand64, -1);
+  rngset(fun, 256, _rand64, -1);
   EZBENCH_N("highwayhash64", 0, HighwayHash64(0, 0, kTestKey1));
   EZBENCH_N("highwayhash64", 8, HighwayHash64("helloooo", 8, kTestKey1));
   EZBENCH_N("highwayhash64", 31, HighwayHash64(fun, 31, kTestKey1));
diff --git a/test/libc/str/memccpy_test.c b/test/libc/str/memccpy_test.c
index 76bb68493..5eba5612f 100644
--- a/test/libc/str/memccpy_test.c
+++ b/test/libc/str/memccpy_test.c
@@ -56,7 +56,7 @@ TEST(memccpy, memcpy) {
     b1 = calloc(1, n);
     b2 = calloc(1, n);
     b3 = calloc(1, n);
-    rngset(b1, n, rand64, -1);
+    rngset(b1, n, _rand64, -1);
     e1 = memccpy_pure(b2, b1, 31337, n);
     e2 = memccpy(b3, b1, 31337, n);
     n1 = e1 ? e1 - b2 : n;
diff --git a/test/libc/str/memcpy_test.c b/test/libc/str/memcpy_test.c
index aae1f1301..25eee7ec6 100644
--- a/test/libc/str/memcpy_test.c
+++ b/test/libc/str/memcpy_test.c
@@ -30,8 +30,8 @@ TEST(memcpy, test) {
   for (unsigned n = 0; n < 1026; ++n) {
     b1 = malloc(n);
     b2 = malloc(n);
-    rngset(b1, n, rand64, -1);
-    rngset(b2, n, rand64, -1);
+    rngset(b1, n, _rand64, -1);
+    rngset(b2, n, _rand64, -1);
     ASSERT_EQ(b1, memcpy(b1, b2, n), "%ld\n\t%#.*s\n\t%#.*s", n, n, b1, n, b2);
     ASSERT_EQ(0, memcmp(b1, b2, n));
     free(b2);
@@ -40,8 +40,8 @@ TEST(memcpy, test) {
   for (unsigned n = kHalfCache3 - 1; n < kHalfCache3 + 2; ++n) {
     b1 = malloc(n);
     b2 = malloc(n);
-    rngset(b1, n, rand64, -1);
-    rngset(b2, n, rand64, -1);
+    rngset(b1, n, _rand64, -1);
+    rngset(b2, n, _rand64, -1);
     ASSERT_EQ(b1, memcpy(b1, b2, n), "%ld\n\t%#.*s\n\t%#.*s", n, n, b1, n, b2);
     ASSERT_EQ(0, memcmp(b1, b2, n));
     free(b2);
@@ -54,8 +54,8 @@ TEST(mempcpy, test) {
   for (unsigned n = 0; n < 1026; ++n) {
     b1 = malloc(n);
     b2 = malloc(n);
-    rngset(b1, n, rand64, -1);
-    rngset(b2, n, rand64, -1);
+    rngset(b1, n, _rand64, -1);
+    rngset(b2, n, _rand64, -1);
     ASSERT_EQ(b1 + n, mempcpy(b1, b2, n));
     ASSERT_EQ(0, memcmp(b1, b2, n));
     free(b2);
@@ -64,8 +64,8 @@ TEST(mempcpy, test) {
   for (unsigned n = kHalfCache3 - 1; n < kHalfCache3 + 2; ++n) {
     b1 = malloc(n);
     b2 = malloc(n);
-    rngset(b1, n, rand64, -1);
-    rngset(b2, n, rand64, -1);
+    rngset(b1, n, _rand64, -1);
+    rngset(b2, n, _rand64, -1);
     ASSERT_EQ(b1 + n, mempcpy(b1, b2, n));
     ASSERT_EQ(0, memcmp(b1, b2, n));
     free(b2);
@@ -78,8 +78,8 @@ TEST(memcpy, direct) {
   for (unsigned n = 0; n < 1026; ++n) {
     b1 = malloc(n);
     b2 = malloc(n);
-    rngset(b1, n, rand64, -1);
-    rngset(b2, n, rand64, -1);
+    rngset(b1, n, _rand64, -1);
+    rngset(b2, n, _rand64, -1);
     ASSERT_EQ(b1, (memcpy)(b1, b2, n), "%ld\n\t%#.*s\n\t%#.*s", n, n, b1, n,
               b2);
     ASSERT_EQ(0, memcmp(b1, b2, n));
@@ -89,8 +89,8 @@ TEST(memcpy, direct) {
   for (unsigned n = kHalfCache3 - 1; n < kHalfCache3 + 2; ++n) {
     b1 = malloc(n);
     b2 = malloc(n);
-    rngset(b1, n, rand64, -1);
-    rngset(b2, n, rand64, -1);
+    rngset(b1, n, _rand64, -1);
+    rngset(b2, n, _rand64, -1);
     ASSERT_EQ(b1, (memcpy)(b1, b2, n), "%ld\n\t%#.*s\n\t%#.*s", n, n, b1, n,
               b2);
     ASSERT_EQ(0, memcmp(b1, b2, n));
@@ -104,8 +104,8 @@ TEST(mempcpy, direct) {
   for (unsigned n = 0; n < 1026; ++n) {
     b1 = malloc(n);
     b2 = malloc(n);
-    rngset(b1, n, rand64, -1);
-    rngset(b2, n, rand64, -1);
+    rngset(b1, n, _rand64, -1);
+    rngset(b2, n, _rand64, -1);
     ASSERT_EQ(b1 + n, (mempcpy)(b1, b2, n));
     ASSERT_EQ(0, memcmp(b1, b2, n));
     free(b2);
@@ -114,8 +114,8 @@ TEST(mempcpy, direct) {
   for (unsigned n = kHalfCache3 - 1; n < kHalfCache3 + 2; ++n) {
     b1 = malloc(n);
     b2 = malloc(n);
-    rngset(b1, n, rand64, -1);
-    rngset(b2, n, rand64, -1);
+    rngset(b1, n, _rand64, -1);
+    rngset(b2, n, _rand64, -1);
     ASSERT_EQ(b1 + n, (mempcpy)(b1, b2, n));
     ASSERT_EQ(0, memcmp(b1, b2, n));
     free(b2);
@@ -162,8 +162,8 @@ TEST(memcpy, testBackwardsOverlap3) {
 
 #define B(F, N)                                              \
   do {                                                       \
-    char *d = rngset(malloc(N), N, rand64, -1);              \
-    char *s = rngset(malloc(N), N, rand64, -1);              \
+    char *d = rngset(malloc(N), N, _rand64, -1);             \
+    char *s = rngset(malloc(N), N, _rand64, -1);             \
     EZBENCH2(#F " " #N, donothing,                           \
              EXPROPRIATE(F(VEIL("r", d), VEIL("r", s), N))); \
     free(d);                                                 \
diff --git a/test/libc/str/strchr_test.c b/test/libc/str/strchr_test.c
index a3ae1586d..fec5a6cae 100644
--- a/test/libc/str/strchr_test.c
+++ b/test/libc/str/strchr_test.c
@@ -118,7 +118,7 @@ TEST(memchr, fuzz) {
   p = malloc(64);
   for (i = -2; i < 257; ++i) {
     for (j = 0; j < 17; ++j) {
-      rngset(p, 64, rand64, -1);
+      rngset(p, 64, _rand64, -1);
       ASSERT_EQ(memchr(p + j, i, 64 - j), memchr_pure(p + j, i, 64 - j));
     }
   }
@@ -139,7 +139,7 @@ TEST(strchrnul, fuzz) {
   p = calloc(1, 64);
   for (i = -2; i < 257; ++i) {
     for (j = 0; j < 17; ++j) {
-      rngset(p, 63, rand64, -1);
+      rngset(p, 63, _rand64, -1);
       ASSERT_EQ(strchrnul(p + j, i), strchrnul_pure(p + j, i));
     }
   }
@@ -159,7 +159,7 @@ TEST(rawmemchr, fuzz) {
   p = malloc(64);
   for (i = -2; i < 257; ++i) {
     for (j = 0; j < 17; ++j) {
-      rngset(p, 63, rand64, -1);
+      rngset(p, 63, _rand64, -1);
       p[63] = i;
       ASSERT_EQ(rawmemchr(p + j, i), rawmemchr_pure(p + j, i));
     }
diff --git a/test/libc/str/strcmp_test.c b/test/libc/str/strcmp_test.c
index 2a10c0fab..f7ceb4ff1 100644
--- a/test/libc/str/strcmp_test.c
+++ b/test/libc/str/strcmp_test.c
@@ -20,10 +20,10 @@
 #include "libc/dce.h"
 #include "libc/intrin/bits.h"
 #include "libc/macros.internal.h"
+#include "libc/mem/gc.internal.h"
 #include "libc/mem/mem.h"
 #include "libc/nexgen32e/cachesize.h"
 #include "libc/nexgen32e/x86feature.h"
-#include "libc/mem/gc.internal.h"
 #include "libc/stdio/rand.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
@@ -506,7 +506,7 @@ dontinline int strcasecmp_pure(const char *a, const char *b) {
 }
 
 char *randomize_buf2str(size_t size, char data[size]) {
-  rngset(data, size, rand64, -1);
+  rngset(data, size, _rand64, -1);
   data[size - 1] = '\0';
   return data;
 }
diff --git a/test/net/http/encodebase64_test.c b/test/net/http/encodebase64_test.c
index 0d187ac65..f957ead37 100644
--- a/test/net/http/encodebase64_test.c
+++ b/test/net/http/encodebase64_test.c
@@ -16,9 +16,9 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/mem/gc.internal.h"
 #include "libc/mem/mem.h"
 #include "libc/stdio/rand.h"
-#include "libc/mem/gc.internal.h"
 #include "libc/str/str.h"
 #include "libc/testlib/ezbench.h"
 #include "libc/testlib/hyperion.h"
@@ -75,7 +75,7 @@ TEST(EncodeBase64, testOom_returnsNullAndSetsSizeToZero) {
 TEST(Base64, RoundTrip) {
   for (i = 0; i < 1000; ++i) {
     n = rand() % 32;
-    rngset(b, n, rand64, -1);
+    rngset(b, n, _rand64, -1);
     p = EncodeBase64(b, n, &m);
     q = DecodeBase64(p, m, &m);
     ASSERT_EQ(n, m);
@@ -88,7 +88,7 @@ TEST(Base64, RoundTrip) {
 TEST(Base64, Fuzz) {
   for (i = 0; i < 1000; ++i) {
     n = rand() % 32;
-    rngset(b, n, rand64, -1);
+    rngset(b, n, _rand64, -1);
     free(DecodeBase64(p, m, 0));
   }
 }
diff --git a/test/net/https/mbedtls_test.c b/test/net/https/mbedtls_test.c
index a29c3265f..72ff3437f 100644
--- a/test/net/https/mbedtls_test.c
+++ b/test/net/https/mbedtls_test.c
@@ -65,12 +65,12 @@ uint64_t rng[12];
 mbedtls_ecp_group grp;
 
 int GetEntropy(void *c, unsigned char *p, size_t n) {
-  rngset(p, n, rand64, -1);
+  rngset(p, n, _rand64, -1);
   return 0;
 }
 
 void SetUp(void) {
-  rngset(rng, sizeof(rng), rand64, -1);
+  rngset(rng, sizeof(rng), _rand64, -1);
 }
 
 #ifdef MBEDTLS_SELF_TEST
@@ -169,7 +169,7 @@ BENCH(p256, bench) {
   mbedtls_ecp_group_init(&grp);
   mbedtls_ecp_group_load(&grp, MBEDTLS_ECP_DP_SECP256R1);
   mbedtls_mpi x = {1, 8, _gc(calloc(8, 8))};
-  rngset(x.p, 8 * 8, rand64, -1);
+  rngset(x.p, 8 * 8, _rand64, -1);
   EZBENCH2("P-256 modulus MbedTLS MPI lib", donothing, P256_MPI(&x));
   EZBENCH2("P-256 modulus Justine rewrite", donothing, P256_JUSTINE(&x));
   mbedtls_ecp_group_free(&grp);
@@ -704,7 +704,7 @@ TEST(ShiftRightAvx, test1) {
   if (!X86_HAVE(AVX)) return;
   int i;
   for (i = 0; i < 10; ++i) {
-    uint64_t mem[1] = {rand64()};
+    uint64_t mem[1] = {_rand64()};
     uint64_t want[1];
     uint64_t got[1];
     memcpy(want, mem, sizeof(mem));
@@ -719,7 +719,7 @@ TEST(ShiftRightAvx, test2) {
   if (!X86_HAVE(AVX)) return;
   int i;
   for (i = 0; i < 10; ++i) {
-    uint64_t mem[2] = {rand64(), rand64()};
+    uint64_t mem[2] = {_rand64(), _rand64()};
     uint64_t want[2];
     uint64_t got[2];
     memcpy(want, mem, sizeof(mem));
@@ -735,7 +735,7 @@ TEST(ShiftRightAvx, test3) {
   if (!X86_HAVE(AVX)) return;
   int i;
   for (i = 0; i < 10; ++i) {
-    uint64_t mem[3] = {rand64(), rand64(), rand64()};
+    uint64_t mem[3] = {_rand64(), _rand64(), _rand64()};
     uint64_t want[3];
     uint64_t got[3];
     memcpy(want, mem, sizeof(mem));
@@ -752,7 +752,7 @@ TEST(ShiftRightAvx, test4) {
   if (!X86_HAVE(AVX)) return;
   int i;
   for (i = 0; i < 10; ++i) {
-    uint64_t mem[4] = {rand64(), rand64(), rand64(), rand64()};
+    uint64_t mem[4] = {_rand64(), _rand64(), _rand64(), _rand64()};
     uint64_t want[4];
     uint64_t got[4];
     memcpy(want, mem, sizeof(mem));
@@ -770,8 +770,8 @@ TEST(ShiftRightAvx, test8) {
   if (!X86_HAVE(AVX)) return;
   int i;
   for (i = 0; i < 10; ++i) {
-    uint64_t mem[8] = {rand64(), rand64(), rand64(), rand64(),
-                       rand64(), rand64(), rand64(), rand64()};
+    uint64_t mem[8] = {_rand64(), _rand64(), _rand64(), _rand64(),
+                       _rand64(), _rand64(), _rand64(), _rand64()};
     uint64_t want[8];
     uint64_t got[8];
     memcpy(want, mem, sizeof(mem));
@@ -793,8 +793,8 @@ TEST(ShiftRightAvx, test9) {
   if (!X86_HAVE(AVX)) return;
   int i;
   for (i = 0; i < 10; ++i) {
-    uint64_t mem[9] = {rand64(), rand64(), rand64(), rand64(), rand64(),
-                       rand64(), rand64(), rand64(), rand64()};
+    uint64_t mem[9] = {_rand64(), _rand64(), _rand64(), _rand64(), _rand64(),
+                       _rand64(), _rand64(), _rand64(), _rand64()};
     uint64_t want[9];
     uint64_t got[9];
     memcpy(want, mem, sizeof(mem));
@@ -811,7 +811,7 @@ TEST(ShiftRightAvx, test9) {
 BENCH(ShiftRight, bench) {
   if (!X86_HAVE(AVX)) return;
   uint64_t x[64];
-  rngset(x, sizeof(x), rand64, -1);
+  rngset(x, sizeof(x), _rand64, -1);
   EZBENCH2("ShiftRight", donothing, ShiftRight(x, 64, 1));
   EZBENCH2("ShiftRightAvx", donothing, ShiftRightAvx(x, 64, 1));
   EZBENCH2("ShiftRightPure", donothing, ShiftRightPure(x, 64, 1));
@@ -819,7 +819,7 @@ BENCH(ShiftRight, bench) {
 
 BENCH(Zeroize, bench) {
   uint64_t x[64];
-  rngset(x, sizeof(x), rand64, -1);
+  rngset(x, sizeof(x), _rand64, -1);
   EZBENCH2("memset (64)", donothing, memset(x, 0, sizeof(x)));
   EZBENCH2("Zeroize (64)", donothing, mbedtls_platform_zeroize(x, 64));
 }
diff --git a/test/tool/net/sqlite_test.c b/test/tool/net/sqlite_test.c
index 39c2381d0..70c5f7255 100644
--- a/test/tool/net/sqlite_test.c
+++ b/test/tool/net/sqlite_test.c
@@ -92,9 +92,9 @@ void *Worker(void *arg) {
   for (int j = 0; j < 50; ++j) {
     ASSERT_EQ(SQLITE_OK, DbExec(db, "BEGIN TRANSACTION"));
     for (int i = 0; i < 4; ++i) {
-      ASSERT_EQ(SQLITE_OK, sqlite3_bind_int64(stmt[0], 1, rand64()));
+      ASSERT_EQ(SQLITE_OK, sqlite3_bind_int64(stmt[0], 1, _rand64()));
       ASSERT_EQ(SQLITE_OK, sqlite3_bind_text(
-                               stmt[0], 2, kNames[rand64() % ARRAYLEN(kNames)],
+                               stmt[0], 2, kNames[_rand64() % ARRAYLEN(kNames)],
                                -1, SQLITE_TRANSIENT));
       ASSERT_EQ(SQLITE_DONE, DbStep(stmt[0]));
       ASSERT_EQ(SQLITE_OK, sqlite3_reset(stmt[0]));
diff --git a/third_party/dlmalloc/init.inc b/third_party/dlmalloc/init.inc
index 0309f7feb..51f774542 100644
--- a/third_party/dlmalloc/init.inc
+++ b/third_party/dlmalloc/init.inc
@@ -83,7 +83,7 @@ static int init_mparams(void) {
       }
       else
 #endif /* USE_DEV_RANDOM */
-      magic = (size_t)(rand64() ^ (size_t)0x55555555U);
+      magic = (size_t)(_rand64() ^ (size_t)0x55555555U);
       magic |= (size_t)8U;    /* ensure nonzero */
       magic &= ~(size_t)7U;   /* improve chances of fault for bad values */
       /* Until memory modes commonly available, use volatile-write */
diff --git a/third_party/mbedtls/test/everest_test.c b/third_party/mbedtls/test/everest_test.c
index 79d5c486b..7492d42da 100644
--- a/third_party/mbedtls/test/everest_test.c
+++ b/third_party/mbedtls/test/everest_test.c
@@ -47,8 +47,8 @@ TEST(everest, tinierVersionBehavesTheSame) {
   size_t i;
   uint8_t secret[32], bpoint[32], public[2][32];
   for (i = 0; i < 500; ++i) {
-    rngset(secret, sizeof(secret), rand64, -1);
-    rngset(bpoint, sizeof(bpoint), rand64, -1);
+    rngset(secret, sizeof(secret), _rand64, -1);
+    rngset(bpoint, sizeof(bpoint), _rand64, -1);
     Hacl_Curve25519_crypto_scalarmult(public[0], secret, bpoint);
     curve25519(public[1], secret, bpoint);
     ASSERT_EQ(0, memcmp(public[0], public[1], sizeof(public[0])));
@@ -70,8 +70,8 @@ TEST(everest, tinierVersionBehavesTheSame) {
 
 BENCH(everest, bench) {
   uint8_t secret[32], bpoint[32], public[32];
-  rngset(secret, sizeof(secret), rand64, -1);
-  rngset(bpoint, sizeof(bpoint), rand64, -1);
+  rngset(secret, sizeof(secret), _rand64, -1);
+  rngset(bpoint, sizeof(bpoint), _rand64, -1);
   EZBENCH2("everest", donothing,
            Hacl_Curve25519_crypto_scalarmult(public, secret, bpoint));
   EZBENCH2("mariana", donothing, curve25519(public, secret, bpoint));
diff --git a/third_party/mbedtls/test/secp384r1_test.c b/third_party/mbedtls/test/secp384r1_test.c
index 2c78465ba..6981959e4 100644
--- a/third_party/mbedtls/test/secp384r1_test.c
+++ b/third_party/mbedtls/test/secp384r1_test.c
@@ -32,7 +32,7 @@
 int ecp_mod_p384_old(mbedtls_mpi *);
 
 int GetEntropy(void *c, unsigned char *p, size_t n) {
-  rngset(p, n, rand64, -1);
+  rngset(p, n, _rand64, -1);
   return 0;
 }
 
diff --git a/third_party/mbedtls/test/test_suite_ssl.c b/third_party/mbedtls/test/test_suite_ssl.c
index 3d6f5e721..ffafcab1f 100644
--- a/third_party/mbedtls/test/test_suite_ssl.c
+++ b/third_party/mbedtls/test/test_suite_ssl.c
@@ -3709,7 +3709,7 @@ void test_ssl_decrypt_non_etm_cbc( int cipher_type, int hash_id, int trunc_hmac,
      * hundreds of milliseconds of latency, which we can't have in our pure
      * testing infrastructure.
      */
-    for( i = block_size; i < buflen; i += max( 1, rand64() & 31 ) )
+    for( i = block_size; i < buflen; i += max( 1, _rand64() & 31 ) )
     {
         mbedtls_test_set_step( i );
         /* Restore correct pre-encryption record */
@@ -3747,7 +3747,7 @@ void test_ssl_decrypt_non_etm_cbc( int cipher_type, int hash_id, int trunc_hmac,
      * hundreds of milliseconds of latency, which we can't have in our pure
      * testing infrastructure.
      */
-    for( i = padlen; i <= pad_max_len; i += max( 1, rand64() & 31 ) )
+    for( i = padlen; i <= pad_max_len; i += max( 1, _rand64() & 31 ) )
     {
         mbedtls_test_set_step( i );
         /* Restore correct pre-encryption record */
diff --git a/tool/build/calculator.inc b/tool/build/calculator.inc
index 3e58c03b6..2a92fb9d8 100644
--- a/tool/build/calculator.inc
+++ b/tool/build/calculator.inc
@@ -98,4 +98,4 @@ M(1, f, "fpclassify", Fpclassify, fpclassify(x),
   "nan=0,inf=1,zero=2,subnorm=3,normal=4")
 
 M(0, i, "rand", Rand, rand(), "deterministic random number")
-M(0, i, "rand64", Rand64, rand64(), "64-bit random number")
+M(0, i, "rand64", _Rand64, _rand64(), "64-bit random number")
diff --git a/tool/net/echo.c b/tool/net/echo.c
index 1b341fba7..2437e5c2e 100644
--- a/tool/net/echo.c
+++ b/tool/net/echo.c
@@ -70,7 +70,7 @@ void UdpClient(void) {
   CHECK_NE(-1, (sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)));
   CHECK_NE(-1, connect(sock, &addr, addrsize));
   for (;;) {
-    rngset(buf, sizeof(buf), rand64, -1);
+    rngset(buf, sizeof(buf), _rand64, -1);
     CHECK_NE(-1, write(sock, &addr, addrsize));
   }
 }
@@ -106,7 +106,7 @@ void TcpClient(void) {
   CHECK_NE(-1, (sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)));
   CHECK_NE(-1, connect(sock, &addr, addrsize));
   for (;;) {
-    rngset(buf, sizeof(buf), rand64, -1);
+    rngset(buf, sizeof(buf), _rand64, -1);
     CHECK_NE(-1, write(sock, buf, sizeof(buf)));
     CHECK_NE(-1, read(sock, buf, sizeof(buf)));
   }
diff --git a/tool/net/lfuncs.c b/tool/net/lfuncs.c
index 25961845f..a4f3b6e0d 100644
--- a/tool/net/lfuncs.c
+++ b/tool/net/lfuncs.c
@@ -150,7 +150,7 @@ int LuaLemur64(lua_State *L) {
 }
 
 int LuaRand64(lua_State *L) {
-  return LuaRand(L, rand64);
+  return LuaRand(L, _rand64);
 }
 
 int LuaRdrand(lua_State *L) {
diff --git a/tool/net/redbean.c b/tool/net/redbean.c
index e5a7a545f..e7670ef56 100644
--- a/tool/net/redbean.c
+++ b/tool/net/redbean.c
@@ -2611,7 +2611,7 @@ static char *ServeAssetCompressed(struct Asset *a) {
   dg.i = 0;
   dg.c = 0;
   if (usingssl) {
-    dg.z = 512 + (rand64() & 1023);
+    dg.z = 512 + (_rand64() & 1023);
   } else {
     dg.z = 65536;
   }
diff --git a/tool/viz/generatematrix.c b/tool/viz/generatematrix.c
index 744665a9f..c54578129 100644
--- a/tool/viz/generatematrix.c
+++ b/tool/viz/generatematrix.c
@@ -16,19 +16,19 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/intrin/safemacros.internal.h"
 #include "libc/fmt/conv.h"
 #include "libc/fmt/fmt.h"
+#include "libc/intrin/safemacros.internal.h"
 #include "libc/limits.h"
 #include "libc/log/check.h"
 #include "libc/log/log.h"
 #include "libc/macros.internal.h"
 #include "libc/math.h"
+#include "libc/mem/gc.internal.h"
 #include "libc/mem/mem.h"
+#include "libc/runtime/runtime.h"
 #include "libc/stdio/lcg.internal.h"
 #include "libc/stdio/rand.h"
-#include "libc/mem/gc.internal.h"
-#include "libc/runtime/runtime.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
 #include "libc/sysv/consts/ex.h"
@@ -184,7 +184,7 @@ void GetOpts(int argc, char *argv[]) {
         want_double = true;
         break;
       case 'g':
-        rand_ = rand64;
+        rand_ = _rand64;
         break;
       case 'N':
         name_ = optarg;
diff --git a/tool/viz/life.c b/tool/viz/life.c
index a3cb922c4..c9e848c1c 100644
--- a/tool/viz/life.c
+++ b/tool/viz/life.c
@@ -414,8 +414,8 @@ static void OnMouseLeftDrag(long y, long x) {
   save_x = x;
   y = top + (y << (zoom + !!zoom));
   x = left + (x << zoom);
-  y += rand64() & ((1ul << (zoom + !!zoom)) - 1);
-  x += rand64() & ((1ul << zoom) - 1);
+  y += _rand64() & ((1ul << (zoom + !!zoom)) - 1);
+  x += _rand64() & ((1ul << zoom) - 1);
   if (y < 0 || y >= byn) return;
   if (x < 0 || x >= bxn) return;
   if (erase) {
@@ -819,7 +819,7 @@ static void Rando1(void) {
   long i, n;
   n = (byn * bxn) >> 6;
   for (i = 0; i < n; ++i) {
-    board[i] = rand64();
+    board[i] = _rand64();
   }
 }