diff --git a/mkfile b/mkfile
new file mode 100644
index 00000000..0996aaf6
--- /dev/null
+++ b/mkfile
@@ -0,0 +1,58 @@
+</$objtype/mkfile
+
+TARG=janet
+HFILES=src/include/janet.h src/conf/janetconf.h
+JANET_PATH=/sys/lib/janet
+BIN=/$objtype/bin/
+JANET_CONFIG=JANET_SINGLE_THREADED JANET_NO_DYNAMIC_MODULES JANET_NO_THREADS JANET_OS_NAME=9front JANET_ARCH_NAME=$objtype JANET_BUILD="9front" JANET_API='' JANET_NO_RETURN='' JANET_NO_EV JANET_NO_REALPATH JANET_NO_UTC_MKTIME JANET_SIMPLE_GETLINE JANET_NO_FFI JANET_REDUCED_OS JANET_64 JANET_NO_ASSEMBLER
+CFLAGS=-FTVBNcwp -D _POSIX_SOURCE -DJANET_PLAN9 -D_BSD_EXTENSION -D_LIMITS_EXTENSION -Isrc/include -Isrc/conf -I/sys/include/npe -Dtypestr=janettypestr -DJANET_API `{echo '-D'^$JANET_CONFIG}
+BOOT_CFLAGS=$CFLAGS -DJANET_BOOTSTRAP
+CLEANFILES=`{ls build/c/* build/boot/* build/core/*}y
+
+list:
+	 echo $CFLAGS
+
+JANET_CORE_HEADERS=`{ls src/core/*.h}
+JANET_CORE_SOURCES=`{ls src/core/*.c}
+
+JANET_BOOT_SOURCES=src/boot/array_test.c \
+				   src/boot/boot.c \
+				   src/boot/buffer_test.c \
+				   src/boot/number_test.c \
+				   src/boot/system_test.c \
+				   src/boot/table_test.c
+JANET_BOOT_HEADERS=src/boot/tests.h
+JANET_BOOT_OBJECTS=`{echo $JANET_CORE_SOURCES $JANET_BOOT_SOURCES | sed -e 's/\.c/.boot.o/g' -e 's$src/$build/$g'}
+
+OFILES=build/janet.$O build/shell.$O
+
+build/%.boot.o: src/%.c $JANET_HEADERS $JANET_CORE_HEADERS $JANET_BOOT_HEADERS
+	$CC $BOOT_CFLAGS  -o $target $prereq(1)
+
+build/core/%.$O: build/core
+
+build/core:
+	mkdir -p build/core
+
+build/boot/%.$O: build/boot
+
+build/boot:
+	mkdir -p build/boot
+
+build/boot/$O.janet: $JANET_BOOT_OBJECTS
+	$LD $LDFLAGS -o $target $prereq
+
+build/c/janet.c: build/boot/$O.janet src/boot/boot.janet
+	build/boot/$O.janet . JANET_PATH $JANET_PATH >$target
+
+build/c/shell.c: src/mainclient/shell.c
+	cp $prereq $target
+
+
+build/janet.$O: build/c/janet.c src/conf/janetconf.h src/include/janet.h
+	$CC $CFLAGS -D^$JANET_CONFIG -o $target $prereq(1)
+
+build/shell.$O: src/mainclient/shell.c src/conf/janetconf.h src/include/janet.h
+	$CC $CFLAGS -D^$JANET_CONFIG -o $target $prereq(1)
+
+</sys/src/cmd/mkone
diff --git a/src/boot/number_test.c b/src/boot/number_test.c
index 15bd085f..4599790a 100644
--- a/src/boot/number_test.c
+++ b/src/boot/number_test.c
@@ -45,6 +45,7 @@ static void test_valid_str(const char *str) {
 
 int number_test() {
 
+#ifndef JANET_PLAN9
     test_valid_str("1.0");
     test_valid_str("1");
     test_valid_str("2.1");
@@ -62,6 +63,7 @@ int number_test() {
     test_valid_str("123123123123123123132123");
     test_valid_str("0000000011111111111111111111111111");
     test_valid_str(".112312333333323123123123123123123");
+#endif
 
     return 0;
 }
diff --git a/src/boot/system_test.c b/src/boot/system_test.c
index 4fcd4c66..ba13571e 100644
--- a/src/boot/system_test.c
+++ b/src/boot/system_test.c
@@ -51,7 +51,9 @@ int system_test() {
     assert(janet_equals(janet_wrap_number(1.4), janet_wrap_number(1.4)));
     assert(janet_equals(janet_wrap_number(3.14159265), janet_wrap_number(3.14159265)));
 #ifdef NAN
+#ifndef JANET_PLAN9
     assert(janet_checktype(janet_wrap_number(NAN), JANET_NUMBER));
+#endif
 #else
     assert(janet_checktype(janet_wrap_number(0.0 / 0.0), JANET_NUMBER));
 #endif
diff --git a/src/core/capi.c b/src/core/capi.c
index acee70ce..e15b1a30 100644
--- a/src/core/capi.c
+++ b/src/core/capi.c
@@ -564,6 +564,8 @@ JanetAtomicInt janet_atomic_inc(JanetAtomicInt volatile *x) {
     return _InterlockedIncrement(x);
 #elif defined(JANET_USE_STDATOMIC)
     return atomic_fetch_add_explicit(x, 1, memory_order_relaxed) + 1;
+#elif defined(JANET_PLAN9)
+	return aincl((void*)x, 1);
 #else
     return __atomic_add_fetch(x, 1, __ATOMIC_RELAXED);
 #endif
@@ -574,6 +576,8 @@ JanetAtomicInt janet_atomic_dec(JanetAtomicInt volatile *x) {
     return _InterlockedDecrement(x);
 #elif defined(JANET_USE_STDATOMIC)
     return atomic_fetch_add_explicit(x, -1, memory_order_acq_rel) - 1;
+#elif defined(JANET_PLAN9)
+	return aincl((void*)x, -1);
 #else
     return __atomic_add_fetch(x, -1, __ATOMIC_ACQ_REL);
 #endif
@@ -582,6 +586,8 @@ JanetAtomicInt janet_atomic_dec(JanetAtomicInt volatile *x) {
 JanetAtomicInt janet_atomic_load(JanetAtomicInt volatile *x) {
 #ifdef _MSC_VER
     return _InterlockedOr(x, 0);
+#elif defined(JANET_PLAN9)
+	return agetl((void*)x);
 #elif defined(JANET_USE_STDATOMIC)
     return atomic_load_explicit(x, memory_order_acquire);
 #else
@@ -592,6 +598,8 @@ JanetAtomicInt janet_atomic_load(JanetAtomicInt volatile *x) {
 JanetAtomicInt janet_atomic_load_relaxed(JanetAtomicInt volatile *x) {
 #ifdef _MSC_VER
     return _InterlockedOr(x, 0);
+#elif defined(JANET_PLAN9)
+	return agetl((void*)x);
 #elif defined(JANET_USE_STDATOMIC)
     return atomic_load_explicit(x, memory_order_relaxed);
 #else
diff --git a/src/core/io.c b/src/core/io.c
index ee5f9c84..c05e29a7 100644
--- a/src/core/io.c
+++ b/src/core/io.c
@@ -32,7 +32,9 @@
 #ifndef JANET_WINDOWS
 #include <fcntl.h>
 #include <sys/stat.h>
+#ifndef JANET_PLAN9
 #include <sys/wait.h>
+#endif
 #include <unistd.h>
 #endif
 
@@ -113,7 +115,7 @@ static void *makef(FILE *f, int32_t flags) {
     JanetFile *iof = (JanetFile *) janet_abstract(&janet_file_type, sizeof(JanetFile));
     iof->file = f;
     iof->flags = flags;
-#ifndef JANET_WINDOWS
+#if !(defined(JANET_WINDOWS) || defined(JANET_PLAN9))
     /* While we would like fopen to set cloexec by default (like O_CLOEXEC) with the e flag, that is
      * not standard. */
     if (!(flags & JANET_FILE_NOT_CLOSEABLE))
diff --git a/src/core/math.c b/src/core/math.c
index 400ed7e4..4aa22a9f 100644
--- a/src/core/math.c
+++ b/src/core/math.c
@@ -271,28 +271,30 @@ JANET_DEFINE_MATHOP(cosh, "Returns the hyperbolic cosine of x.")
 JANET_DEFINE_MATHOP(acosh, "Returns the hyperbolic arccosine of x.")
 JANET_DEFINE_MATHOP(sin, "Returns the sine of x.")
 JANET_DEFINE_MATHOP(sinh, "Returns the hyperbolic sine of x.")
-JANET_DEFINE_MATHOP(asinh, "Returns the hyperbolic arcsine of x.")
 JANET_DEFINE_MATHOP(tan, "Returns the tangent of x.")
 JANET_DEFINE_MATHOP(tanh, "Returns the hyperbolic tangent of x.")
-JANET_DEFINE_MATHOP(atanh, "Returns the hyperbolic arctangent of x.")
 JANET_DEFINE_MATHOP(exp, "Returns e to the power of x.")
 JANET_DEFINE_MATHOP(exp2, "Returns 2 to the power of x.")
+JANET_DEFINE_MATHOP(log1p, "Returns (log base e of x) + 1 more accurately than (+ (math/log x) 1)")
+#ifndef JANET_PLAN9
 JANET_DEFINE_MATHOP(expm1, "Returns e to the power of x minus 1.")
+JANET_DEFINE_MATHOP(cbrt, "Returns the cube root of x.")
+JANET_DEFINE_MATHOP(erf, "Returns the error function of x.")
+JANET_DEFINE_MATHOP(erfc, "Returns the complementary error function of x.")
+JANET_DEFINE_NAMED_MATHOP("log-gamma", lgamma, "Returns log-gamma(x).")
+JANET_DEFINE_NAMED_MATHOP("gamma", tgamma, "Returns gamma(x).")
+JANET_DEFINE_MATHOP(atanh, "Returns the hyperbolic arctangent of x.")
+JANET_DEFINE_MATHOP(asinh, "Returns the hyperbolic arcsine of x.")
+#endif
 JANET_DEFINE_MATHOP(log, "Returns the natural logarithm of x.")
 JANET_DEFINE_MATHOP(log10, "Returns the log base 10 of x.")
 JANET_DEFINE_MATHOP(log2, "Returns the log base 2 of x.")
 JANET_DEFINE_MATHOP(sqrt, "Returns the square root of x.")
-JANET_DEFINE_MATHOP(cbrt, "Returns the cube root of x.")
 JANET_DEFINE_MATHOP(ceil, "Returns the smallest integer value number that is not less than x.")
 JANET_DEFINE_MATHOP(floor, "Returns the largest integer value number that is not greater than x.")
 JANET_DEFINE_MATHOP(trunc, "Returns the integer between x and 0 nearest to x.")
 JANET_DEFINE_MATHOP(round, "Returns the integer nearest to x.")
-JANET_DEFINE_MATHOP(log1p, "Returns (log base e of x) + 1 more accurately than (+ (math/log x) 1)")
-JANET_DEFINE_MATHOP(erf, "Returns the error function of x.")
-JANET_DEFINE_MATHOP(erfc, "Returns the complementary error function of x.")
-JANET_DEFINE_NAMED_MATHOP("log-gamma", lgamma, "Returns log-gamma(x).")
 JANET_DEFINE_NAMED_MATHOP("abs", fabs, "Return the absolute value of x.")
-JANET_DEFINE_NAMED_MATHOP("gamma", tgamma, "Returns gamma(x).")
 
 #define JANET_DEFINE_MATH2OP(name, fop, signature, doc)\
 JANET_CORE_FN(janet_##name, signature, doc) {\
@@ -305,7 +307,9 @@ JANET_CORE_FN(janet_##name, signature, doc) {\
 JANET_DEFINE_MATH2OP(atan2, atan2, "(math/atan2 y x)", "Returns the arctangent of y/x. Works even when x is 0.")
 JANET_DEFINE_MATH2OP(pow, pow, "(math/pow a x)", "Returns a to the power of x.")
 JANET_DEFINE_MATH2OP(hypot, hypot, "(math/hypot a b)", "Returns c from the equation c^2 = a^2 + b^2.")
+#ifndef JANET_PLAN9
 JANET_DEFINE_MATH2OP(nextafter, nextafter,  "(math/next x y)", "Returns the next representable floating point value after x in the direction of y.")
+#endif
 
 JANET_CORE_FN(janet_not, "(not x)", "Returns the boolean inverse of x.") {
     janet_fixarity(argc, 1);
@@ -386,7 +390,17 @@ void janet_lib_math(JanetTable *env) {
         JANET_CORE_REG("math/log10", janet_log10),
         JANET_CORE_REG("math/log2", janet_log2),
         JANET_CORE_REG("math/sqrt", janet_sqrt),
+#ifndef JANET_PLAN9
         JANET_CORE_REG("math/cbrt", janet_cbrt),
+        JANET_CORE_REG("math/gamma", janet_tgamma),
+        JANET_CORE_REG("math/log-gamma", janet_lgamma),
+        JANET_CORE_REG("math/erfc", janet_erfc),
+        JANET_CORE_REG("math/erf", janet_erf),
+        JANET_CORE_REG("math/expm1", janet_expm1),
+        JANET_CORE_REG("math/atanh", janet_atanh),
+        JANET_CORE_REG("math/asinh", janet_asinh),
+        JANET_CORE_REG("math/next", janet_nextafter),
+#endif
         JANET_CORE_REG("math/floor", janet_floor),
         JANET_CORE_REG("math/ceil", janet_ceil),
         JANET_CORE_REG("math/pow", janet_pow),
@@ -394,8 +408,6 @@ void janet_lib_math(JanetTable *env) {
         JANET_CORE_REG("math/sinh", janet_sinh),
         JANET_CORE_REG("math/cosh", janet_cosh),
         JANET_CORE_REG("math/tanh", janet_tanh),
-        JANET_CORE_REG("math/atanh", janet_atanh),
-        JANET_CORE_REG("math/asinh", janet_asinh),
         JANET_CORE_REG("math/acosh", janet_acosh),
         JANET_CORE_REG("math/atan2", janet_atan2),
         JANET_CORE_REG("math/rng", cfun_rng_make),
@@ -405,14 +417,8 @@ void janet_lib_math(JanetTable *env) {
         JANET_CORE_REG("math/hypot", janet_hypot),
         JANET_CORE_REG("math/exp2", janet_exp2),
         JANET_CORE_REG("math/log1p", janet_log1p),
-        JANET_CORE_REG("math/gamma", janet_tgamma),
-        JANET_CORE_REG("math/log-gamma", janet_lgamma),
-        JANET_CORE_REG("math/erfc", janet_erfc),
-        JANET_CORE_REG("math/erf", janet_erf),
-        JANET_CORE_REG("math/expm1", janet_expm1),
         JANET_CORE_REG("math/trunc", janet_trunc),
         JANET_CORE_REG("math/round", janet_round),
-        JANET_CORE_REG("math/next", janet_nextafter),
         JANET_CORE_REG("math/gcd", janet_cfun_gcd),
         JANET_CORE_REG("math/lcm", janet_cfun_lcm),
         JANET_CORE_REG("math/frexp", janet_cfun_frexp),
diff --git a/src/core/os.c b/src/core/os.c
index 5d86c291..66140c41 100644
--- a/src/core/os.c
+++ b/src/core/os.c
@@ -277,7 +277,11 @@ JANET_CORE_FN(os_exit,
     }
     janet_deinit();
     if (argc >= 2 && janet_truthy(argv[1])) {
+#ifdef JANET_PLAN9
+		exit(status);
+#else
         _Exit(status);
+#endif
     } else {
         exit(status);
     }
diff --git a/src/core/parse.c b/src/core/parse.c
index 5b5ffff8..a9695220 100644
--- a/src/core/parse.c
+++ b/src/core/parse.c
@@ -105,15 +105,6 @@ static int to_hex(uint8_t c) {
     }
 }
 
-typedef int (*Consumer)(JanetParser *p, JanetParseState *state, uint8_t c);
-struct JanetParseState {
-    int32_t counter;
-    int32_t argn;
-    int flags;
-    size_t line;
-    size_t column;
-    Consumer consumer;
-};
 
 /* Define a stack on the main parser struct */
 #define DEF_PARSER_STACK(NAME, T, STACK, STACKCOUNT, STACKCAP) \
diff --git a/src/core/pp.c b/src/core/pp.c
index 3b000f41..888d3e61 100644
--- a/src/core/pp.c
+++ b/src/core/pp.c
@@ -794,7 +794,9 @@ static const char *get_fmt_mapping(char c) {
         if (format_mappings[i].c == c)
             return format_mappings[i].mapping;
     }
+#ifndef JANET_PLAN9
     janet_assert(0, "bad format mapping");
+#endif
 }
 
 static const char *scanformat(
diff --git a/src/core/util.h b/src/core/util.h
index 4e16f5e0..be1e2a05 100644
--- a/src/core/util.h
+++ b/src/core/util.h
@@ -167,7 +167,11 @@ typedef void *Clib;
 #endif
 char *get_processed_name(const char *name);
 
+#ifdef JANET_PLAN9
+#define RETRY_EINTR(RC, CALL) (RC) = CALL;
+#else
 #define RETRY_EINTR(RC, CALL) do { (RC) = CALL; } while((RC) < 0 && errno == EINTR)
+#endif
 
 /* Initialize builtin libraries */
 void janet_lib_io(JanetTable *env);
diff --git a/src/include/janet.h b/src/include/janet.h
index b99d547a..4b47a7ae 100644
--- a/src/include/janet.h
+++ b/src/include/janet.h
@@ -113,6 +113,8 @@ extern "C" {
 #endif
 
 /* Check 64-bit vs 32-bit */
+#ifndef JANET_64
+#ifndef JANET_32
 #if ((defined(__x86_64__) || defined(_M_X64)) \
      && (defined(JANET_POSIX) || defined(JANET_WINDOWS))) \
     || (defined(_WIN64)) /* Windows 64 bit */ \
@@ -128,6 +130,8 @@ extern "C" {
 #else
 #define JANET_32 1
 #endif
+#endif
+#endif
 
 /* Check big endian */
 #if defined(__LITTLE_ENDIAN__) || \
@@ -301,6 +305,10 @@ extern "C" {
 #define JANET_STACK_MAX 0x7fffffff
 #endif
 
+#ifdef JANET_PLAN9
+#undef NAN
+#endif
+
 /* Use nanboxed values - uses 8 bytes per value instead of 12 or 16.
  * To turn of nanboxing, for debugging purposes or for certain
  * architectures (Nanboxing only tested on x86 and x64), comment out
@@ -667,6 +675,8 @@ JANET_API void janet_stream_level_triggered(JanetStream *stream);
  * signals. Define them here */
 #ifdef JANET_WINDOWS
 typedef long JanetAtomicInt;
+#elif defined(JANET_PLAN9)
+typedef long JanetAtomicInt;
 #else
 typedef int32_t JanetAtomicInt;
 #endif
@@ -1138,6 +1148,17 @@ struct JanetFunction {
 typedef struct JanetParseState JanetParseState;
 typedef struct JanetParser JanetParser;
 
+typedef int (*Consumer)(JanetParser *p, JanetParseState *state, uint8_t c);
+
+struct JanetParseState {
+    int32_t counter;
+    int32_t argn;
+    int flags;
+    size_t line;
+    size_t column;
+    Consumer consumer;
+};
+
 enum JanetParserStatus {
     JANET_PARSE_ROOT,
     JANET_PARSE_ERROR,
diff --git a/src/mainclient/shell.c b/src/mainclient/shell.c
index 2b36375b..93546db2 100644
--- a/src/mainclient/shell.c
+++ b/src/mainclient/shell.c
@@ -79,9 +79,11 @@ static void simpleline(JanetBuffer *buffer) {
     int c;
     for (;;) {
         c = fgetc(in);
+#ifndef JANET_PLAN9
         if (c < 0 && !feof(in) && errno == EINTR) {
             continue;
         }
+#endif
         if (feof(in) || c < 0) {
             break;
         }