diff --git a/third_party/quickjs/qjsc.c b/third_party/quickjs/qjsc.c
index 707c7a230..242b641a7 100644
--- a/third_party/quickjs/qjsc.c
+++ b/third_party/quickjs/qjsc.c
@@ -632,9 +632,11 @@ int main(int argc, char **argv)
                 "\n"
                 );
     } else {
+#ifndef COSMO
         fprintf(fo, "#include <inttypes.h>\n"
                 "\n"
                 );
+#endif
     }
     for(i = optind; i < argc; i++) {
         const char *filename = argv[i];
diff --git a/third_party/quickjs/quickjs-libc.c b/third_party/quickjs/quickjs-libc.c
index d0ebefdfc..163e058cf 100644
--- a/third_party/quickjs/quickjs-libc.c
+++ b/third_party/quickjs/quickjs-libc.c
@@ -24,6 +24,7 @@
  */
 #include "libc/assert.h"
 #include "libc/calls/calls.h"
+#include "libc/calls/internal.h"
 #include "libc/calls/ioctl.h"
 #include "libc/calls/struct/winsize.h"
 #include "libc/calls/termios.h"
@@ -31,6 +32,7 @@
 #include "libc/fmt/conv.h"
 #include "libc/fmt/fmt.h"
 #include "libc/limits.h"
+#include "libc/nt/synchronization.h"
 #include "libc/runtime/dlfcn.h"
 #include "libc/runtime/sysconf.h"
 #include "libc/sock/select.h"
@@ -1737,7 +1739,6 @@ static JSValue js_os_ttySetRaw(JSContext *ctx, JSValueConst this_val,
     
     if (JS_ToInt32(ctx, &fd, argv[0]))
         return JS_EXCEPTION;
-    
     memset(&tty, 0, sizeof(tty));
     tcgetattr(fd, &tty);
     oldtty = tty;
@@ -2063,9 +2064,14 @@ static void call_handler(JSContext *ctx, JSValueConst func)
     JS_FreeValue(ctx, ret);
 }
 
-#if defined(_WIN32)
+#if defined(COSMO)
+#define DWORD	uint32_t
+#define HANDLE	int64_t
+#define _get_osfhandle(fd)	g_fds.p[fd].handle
+#define INFINITE		((DWORD)-1)
+#define WAIT_OBJECT_0		((DWORD)0)
 
-static int js_os_poll(JSContext *ctx)
+static int js_os_poll_nt(JSContext *ctx)
 {
     JSRuntime *rt = JS_GetRuntime(ctx);
     JSThreadState *ts = JS_GetRuntimeOpaque(rt);
@@ -2138,7 +2144,6 @@ static int js_os_poll(JSContext *ctx)
     }
     return 0;
 }
-#else
 
 #ifdef USE_WORKER
 
@@ -2219,6 +2224,9 @@ static int handle_posted_message(JSRuntime *rt, JSContext *ctx,
 
 static int js_os_poll(JSContext *ctx)
 {
+    if (IsWindows()) {
+        return js_os_poll_nt(ctx);
+    }
     JSRuntime *rt = JS_GetRuntime(ctx);
     JSThreadState *ts = JS_GetRuntimeOpaque(rt);
     int ret, fd_max, min_delay;
diff --git a/third_party/quickjs/quickjs.mk b/third_party/quickjs/quickjs.mk
index 8e8396a5f..0e068ef55 100644
--- a/third_party/quickjs/quickjs.mk
+++ b/third_party/quickjs/quickjs.mk
@@ -52,8 +52,7 @@ THIRD_PARTY_QUICKJS_A_SRCS =					\
 	third_party/quickjs/tok.c				\
 	third_party/quickjs/typedarray.c			\
 	third_party/quickjs/uri.c				\
-	third_party/quickjs/usage.c				\
-	third_party/quickjs/wut.c
+	third_party/quickjs/usage.c
 
 THIRD_PARTY_QUICKJS_A_HDRS =					\
 	third_party/quickjs/cutils.h				\
@@ -78,6 +77,7 @@ THIRD_PARTY_QUICKJS_A_DIRECTDEPS =				\
 	LIBC_LOG						\
 	LIBC_MEM						\
 	LIBC_NEXGEN32E						\
+	LIBC_NT_KERNEL32					\
 	LIBC_RUNTIME						\
 	LIBC_SOCK						\
 	LIBC_STDIO						\
@@ -127,11 +127,22 @@ THIRD_PARTY_QUICKJS_CHECKS =					\
 	$(THIRD_PARTY_QUICKJS_A).pkg				\
 	$(THIRD_PARTY_QUICKJS_A_HDRS:%=o/$(MODE)/%.ok)
 
+o/$(MODE)/third_party/quickjs/qjscalc.c:			\
+third_party/quickjs/qjscalc.js					\
+o/$(MODE)/third_party/quickjs/qjsc.com
+	o/$(MODE)/third_party/quickjs/qjsc.com -fbignum -o $@ -c $<
+o/$(MODE)/third_party/quickjs/repl.c:				\
+third_party/quickjs/repl.js					\
+o/$(MODE)/third_party/quickjs/qjsc.com
+	o/$(MODE)/third_party/quickjs/qjsc.com -o $@ -m -c $<
+
 o/$(MODE)/third_party/quickjs/qjs.com.dbg:			\
 		$(THIRD_PARTY_QUICKJS_A_DEPS)			\
 		$(THIRD_PARTY_QUICKJS_A)			\
 		$(THIRD_PARTY_QUICKJS_A).pkg			\
 		o/$(MODE)/third_party/quickjs/qjs.o		\
+		o/$(MODE)/third_party/quickjs/repl.o		\
+		o/$(MODE)/third_party/quickjs/qjscalc.o		\
 		$(CRT)						\
 		$(APE)
 	-@$(APELINK)
diff --git a/third_party/quickjs/wut.c b/third_party/quickjs/wut.c
deleted file mode 100644
index 583019bdc..000000000
--- a/third_party/quickjs/wut.c
+++ /dev/null
@@ -1,24 +0,0 @@
-/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
-│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
-╞══════════════════════════════════════════════════════════════════════════════╡
-│ Copyright 2021 Justine Alexandra Roberts Tunney                              │
-│                                                                              │
-│ Permission to use, copy, modify, and/or distribute this software for         │
-│ any purpose with or without fee is hereby granted, provided that the         │
-│ above copyright notice and this permission notice appear in all copies.      │
-│                                                                              │
-│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
-│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
-│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
-│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
-│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
-│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
-│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
-│ PERFORMANCE OF THIS SOFTWARE.                                                │
-╚─────────────────────────────────────────────────────────────────────────────*/
-#include "third_party/quickjs/quickjs.h"
-
-uint8_t qjsc_repl[FRAMESIZE];
-uint32_t qjsc_repl_size = FRAMESIZE;
-uint8_t qjsc_qjscalc[FRAMESIZE];
-uint32_t qjsc_qjscalc_size = FRAMESIZE;