diff --git a/libc/log/die.c b/libc/log/die.c
index 9151e0f45..65340aef7 100644
--- a/libc/log/die.c
+++ b/libc/log/die.c
@@ -43,14 +43,7 @@ relegated wontreturn void __die(void) {
     if (IsDebuggerPresent(false)) {
       DebugBreak();
     }
-    if (weaken(ShowBacktrace)) {
-      weaken(ShowBacktrace)(2, __builtin_frame_address(0));
-    } else if (weaken(PrintBacktraceUsingSymbols) && weaken(GetSymbolTable)) {
-      weaken(PrintBacktraceUsingSymbols)(2, __builtin_frame_address(0),
-                                         weaken(GetSymbolTable)());
-    } else {
-      kprintf("can't backtrace b/c `ShowCrashReports` not linked\n");
-    }
+    ShowBacktrace(2, __builtin_frame_address(0));
     __restorewintty();
     _Exit(77);
   } else if (owner == me) {
diff --git a/libc/rand/rdrand.c b/libc/rand/rdrand.c
index b431b4ee5..341c385ad 100644
--- a/libc/rand/rdrand.c
+++ b/libc/rand/rdrand.c
@@ -35,6 +35,7 @@ static dontinline uint64_t rdrand_failover(void) {
       if (r == -1 && errno == EINTR) {
         r = 0;
       } else if (r == -1 && errno == EAGAIN) {
+        r = 0;
         f = 0;
       } else {
         return rand64();
diff --git a/tool/build/mkdeps.c b/tool/build/mkdeps.c
index 7501a3cfc..eefb4dfa3 100644
--- a/tool/build/mkdeps.c
+++ b/tool/build/mkdeps.c
@@ -29,6 +29,7 @@
 #include "libc/errno.h"
 #include "libc/fmt/fmt.h"
 #include "libc/intrin/kprintf.h"
+#include "libc/intrin/pthread.h"
 #include "libc/intrin/spinlock.h"
 #include "libc/intrin/wait0.internal.h"
 #include "libc/log/check.h"
@@ -132,10 +133,10 @@ struct Sauce *sauces;
 struct Strings strings;
 struct Sources sources;
 const char *buildroot;
-_Alignas(64) char galock;
-_Alignas(64) char readlock;
-_Alignas(64) char writelock;
-_Alignas(64) char reportlock;
+pthread_mutex_t galock;
+pthread_mutex_t readlock;
+pthread_mutex_t writelock;
+pthread_mutex_t reportlock;
 
 unsigned Hash(const void *s, size_t l) {
   return max(1, crc32c(0, s, l));
@@ -262,18 +263,18 @@ int LoadRelationshipsWorker(void *arg) {
   buf += PAGESIZE;
   buf[-1] = '\n';
   for (;;) {
-    _spinlock(&galock);
+    pthread_mutex_lock(&galock);
     if ((src = getargs_next(&ga))) strcpy(srcbuf, src);
-    _spunlock(&galock);
+    pthread_mutex_unlock(&galock);
     if (!src) break;
     src = srcbuf;
     if (ShouldSkipSource(src)) continue;
     n = strlen(src);
-    _spinlock(&readlock);
+    pthread_mutex_lock(&readlock);
     srcid = GetSourceId(src, n);
-    _spunlock(&readlock);
+    pthread_mutex_unlock(&readlock);
     if ((fd = open(src, O_RDONLY)) == -1) {
-      _spinlock(&reportlock);
+      pthread_mutex_lock(&reportlock);
       OnMissingFile(ga.path, src);
     }
     CHECK_NE(-1, (rc = read(fd, buf, MAX_READ)));
@@ -286,14 +287,14 @@ int LoadRelationshipsWorker(void *arg) {
       path = p + inclen;
       pathend = memchr(path, '"', pe - path);
       if (pathend && (p[-1] == '#' || p[-1] == '.') && p[-2] == '\n') {
-        _spinlock(&readlock);
+        pthread_mutex_lock(&readlock);
         dependency = GetSourceId(path, pathend - path);
-        _spunlock(&readlock);
+        pthread_mutex_unlock(&readlock);
         edge.from = srcid;
         edge.to = dependency;
-        _spinlock(&writelock);
+        pthread_mutex_lock(&writelock);
         append(&edges, &edge);
-        _spunlock(&writelock);
+        pthread_mutex_unlock(&writelock);
         p = pathend;
       }
     }
@@ -311,7 +312,7 @@ void LoadRelationships(int argc, char *argv[]) {
                   CLONE_SETTLS | CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID,
               (void *)(intptr_t)i, 0, __initialize_tls(tls[i]), 64,
               (int *)(tls[i] + 0x38)) == -1) {
-      _spinlock(&reportlock);
+      pthread_mutex_lock(&reportlock);
       kprintf("error: clone(%d) failed %m\n", i);
       exit(1);
     }
@@ -426,7 +427,7 @@ void Explore(void) {
                   CLONE_SETTLS | CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID,
               (void *)(intptr_t)i, 0, __initialize_tls(tls[i]), 64,
               (int *)(tls[i] + 0x38)) == -1) {
-      _spinlock(&reportlock);
+      pthread_mutex_lock(&reportlock);
       kprintf("error: clone(%d) failed %m\n", i);
       exit(1);
     }
diff --git a/tool/net/redbean.c b/tool/net/redbean.c
index 5e0096bf3..7958f88ca 100644
--- a/tool/net/redbean.c
+++ b/tool/net/redbean.c
@@ -139,7 +139,7 @@ STATIC_YOINK("zip_uri_support");
 #define REDBEAN "redbean"
 #endif
 
-#define VERSION          0x020003
+#define VERSION          0x020004
 #define HEARTBEAT        5000 /*ms*/
 #define HASH_LOAD_FACTOR /* 1. / */ 4
 #define MONITOR_MICROS   150000