diff --git a/src/compiler/boot.dst b/src/compiler/boot.dst
index e6c5f014..550a1107 100644
--- a/src/compiler/boot.dst
+++ b/src/compiler/boot.dst
@@ -956,18 +956,18 @@ onvalue."
       (chunks buf p)
       (:= len (length buf))
       (loop [i :range [0 len]]
-        (fiber.yield (get buf i))))
+        (yield (get buf i))))
    0))
 
  # Fiber stream of values
  (def vals (coro
   (while going
     (switch (parser.status p)
-     :full (fiber.yield (parser.produce p))
+     :full (yield (parser.produce p))
      :error (onerr "parse" (parser.error p))
      (switch (fiber.status chars)
-      :new (parser.byte p (fiber.resume chars))
-      :pending (parser.byte p (fiber.resume chars))
+      :new (parser.byte p (resume chars))
+      :pending (parser.byte p (resume chars))
       (:= going false))))
   (when (not= :root (parser.status p))
    (onerr "parse" "unexpected end of source"))))
@@ -982,7 +982,7 @@ onvalue."
       (do
        (:= good false)
        (onerr "compile" (get res :error))))) :a))
-  (def res (fiber.resume f))
+  (def res (resume f))
   (when good
    (def sig (fiber.status f))
    (if going
@@ -993,7 +993,7 @@ onvalue."
  # Run loop
  (def oldenv *env*)
  (:= *env* env)
- (while going (eval1 (fiber.resume vals)))
+ (while going (eval1 (resume vals)))
  (:= *env* oldenv)
 
  env)
diff --git a/src/compiler/stl.c b/src/compiler/stl.c
index aa149e97..1eecb9f7 100644
--- a/src/compiler/stl.c
+++ b/src/compiler/stl.c
@@ -58,6 +58,26 @@ static const DstReg cfuns[] = {
     {NULL, NULL}
 };
 
+/* Utility for inline assembly */
+static DstFunction *dst_quick_asm(
+        int32_t arity,
+        int varargs,
+        int32_t slots,
+        const uint32_t *bytecode,
+        size_t bytecode_size) {
+    DstFuncDef *def = dst_funcdef_alloc();
+    def->arity = arity;
+    def->flags = varargs ? DST_FUNCDEF_FLAG_VARARG : 0;
+    def->slotcount = slots;
+    def->bytecode = malloc(bytecode_size);
+    def->bytecode_length = bytecode_size / sizeof(uint32_t);
+    if (!def->bytecode) {
+        DST_OUT_OF_MEMORY;
+    }
+    memcpy(def->bytecode, bytecode, bytecode_size);
+    return dst_thunk(def);
+}
+
 DstTable *dst_stl_env(int flags) {
     static uint32_t error_asm[] = {
         DOP_ERROR
@@ -70,6 +90,15 @@ DstTable *dst_stl_env(int flags) {
        DOP_SIGNAL | (2 << 24),
        DOP_RETURN_NIL
     };
+    static uint32_t yield_asm[] = {
+        DOP_SIGNAL | (3 << 24),
+        DOP_RETURN
+    };
+    static uint32_t resume_asm[] = {
+        DOP_RESUME | (1 << 24),
+        DOP_RETURN
+    };
+
     DstTable *env = dst_table(0);
     Dst ret = dst_wrap_table(env);
 
@@ -79,6 +108,8 @@ DstTable *dst_stl_env(int flags) {
     dst_env_def(env, "debug", dst_wrap_function(dst_quick_asm(0, 0, 1, debug_asm, sizeof(debug_asm))));
     dst_env_def(env, "error", dst_wrap_function(dst_quick_asm(1, 0, 1, error_asm, sizeof(error_asm))));
     dst_env_def(env, "apply1", dst_wrap_function(dst_quick_asm(2, 0, 2, apply_asm, sizeof(apply_asm))));
+    dst_env_def(env, "yield", dst_wrap_function(dst_quick_asm(1, 0, 2, yield_asm, sizeof(yield_asm))));
+    dst_env_def(env, "resume", dst_wrap_function(dst_quick_asm(2, 0, 2, resume_asm, sizeof(resume_asm))));
 
     dst_env_def(env, "VERSION", dst_cstringv(DST_VERSION));
 
diff --git a/src/core/bytecode.c b/src/core/bytecode.c
index 90eba80d..74472569 100644
--- a/src/core/bytecode.c
+++ b/src/core/bytecode.c
@@ -241,18 +241,3 @@ DstFunction *dst_thunk(DstFuncDef *def) {
     dst_assert(def->environments_length == 0, "tried to create thunk that needs upvalues");
     return func;
 }
-
-/* Utility for inline assembly */
-DstFunction *dst_quick_asm(int32_t arity, int varargs, int32_t slots, const uint32_t *bytecode, size_t bytecode_size) {
-    DstFuncDef *def = dst_funcdef_alloc();
-    def->arity = arity;
-    def->flags = varargs ? DST_FUNCDEF_FLAG_VARARG : 0;
-    def->slotcount = slots;
-    def->bytecode = malloc(bytecode_size);
-    def->bytecode_length = bytecode_size / sizeof(uint32_t);
-    if (!def->bytecode) {
-        DST_OUT_OF_MEMORY;
-    }
-    memcpy(def->bytecode, bytecode, bytecode_size);
-    return dst_thunk(def);
-}
diff --git a/src/core/fiber.c b/src/core/fiber.c
index e39d39ad..9a490841 100644
--- a/src/core/fiber.c
+++ b/src/core/fiber.c
@@ -438,21 +438,7 @@ static const DstReg cfuns[] = {
 
 /* Module entry point */
 int dst_lib_fiber(DstArgs args) {
-    static uint32_t yield_asm[] = {
-        DOP_SIGNAL | (3 << 24),
-        DOP_RETURN
-    };
-    static uint32_t resume_asm[] = {
-        DOP_RESUME | (1 << 24),
-        DOP_RETURN
-    };
     DstTable *env = dst_env_arg(args);
     dst_env_cfuns(env, cfuns);
-    dst_env_def(env, "fiber.yield", 
-            dst_wrap_function(dst_quick_asm(1, 0, 2,
-                    yield_asm, sizeof(yield_asm))));
-    dst_env_def(env, "fiber.resume",
-            dst_wrap_function(dst_quick_asm(2, 0, 2,
-                    resume_asm, sizeof(resume_asm))));
     return 0;
 }
diff --git a/src/core/os.c b/src/core/os.c
index c133a315..a9222182 100644
--- a/src/core/os.c
+++ b/src/core/os.c
@@ -84,10 +84,6 @@ static int os_exit(DstArgs args) {
     DST_MAXARITY(args, 1);
     if (args.n == 0) {
         exit(EXIT_SUCCESS);
-    } else if (dst_checktype(args.v[0], DST_TRUE)
-            || dst_checktype(args.v[0], DST_FALSE)) {
-        exit(dst_unwrap_boolean(args.v[0]) ? EXIT_SUCCESS : EXIT_FAILURE);
-        return 0;
     } else if (dst_checktype(args.v[0], DST_INTEGER)) {
         exit(dst_unwrap_integer(args.v[0]));
     } else {
diff --git a/src/core/vm.c b/src/core/vm.c
index aa653134..d1e85bdc 100644
--- a/src/core/vm.c
+++ b/src/core/vm.c
@@ -922,8 +922,8 @@ int dst_init() {
     dst_vm_next_collection = 0;
     /* Setting memoryInterval to zero forces
      * a collection pretty much every cycle, which is
-     * horrible for performance, but helps ensure
-     * there are no memory bugs during dev */
+     * incredibly horrible for performance, but can help ensure
+     * there are no memory bugs during development */
     dst_vm_gc_interval = 0x10000;
     dst_symcache_init();
     /* Initialize gc roots */
diff --git a/src/include/dst/dst.h b/src/include/dst/dst.h
index 65fa7d08..f413b870 100644
--- a/src/include/dst/dst.h
+++ b/src/include/dst/dst.h
@@ -168,12 +168,6 @@ void dst_gcunlock(int handle);
 DstFuncDef *dst_funcdef_alloc(void);
 DstFunction *dst_thunk(DstFuncDef *def);
 int dst_verify(DstFuncDef *def);
-DstFunction *dst_quick_asm(
-        int32_t arity,
-        int varargs,
-        int32_t slots,
-        const uint32_t *bytecode,
-        size_t bytecode_size);
 
 /* Misc */
 int dst_equals(Dst x, Dst y);
diff --git a/test/suite0.dst b/test/suite0.dst
index 58df91a6..a398275c 100644
--- a/test/suite0.dst
+++ b/test/suite0.dst
@@ -149,18 +149,18 @@
 (def afiber (fiber.new (fn [x]
 	(error (string "hello, " x))) :e))
 
-(def afiber-result (fiber.resume afiber "world!"))
+(def afiber-result (resume afiber "world!"))
 
 (assert (= afiber-result "hello, world!") "fiber error result")
 (assert (= (fiber.status afiber) :error) "fiber error status")
 
 # yield tests
 
-(def t (fiber.new (fn [] (fiber.yield 1) (fiber.yield 2) 3)))
+(def t (fiber.new (fn [] (yield 1) (yield 2) 3)))
 
-(assert (= 1 (fiber.resume t)) "initial transfer to new fiber")
-(assert (= 2 (fiber.resume t)) "second transfer to fiber")
-(assert (= 3 (fiber.resume t)) "return from fiber")
+(assert (= 1 (resume t)) "initial transfer to new fiber")
+(assert (= 2 (resume t)) "second transfer to fiber")
+(assert (= 3 (resume t)) "return from fiber")
 (assert (= (fiber.status t) :dead) "finished fiber is dead")
 
 # Var arg tests
@@ -192,7 +192,7 @@
 (def 🦊 :fox)
 (def 🐮 :cow)
 (assert (= (string "🐼" 🦊 🐮) "🐼:fox:cow") "emojis 🙉 :)")
-(assert (not= 🦊 :🦊) "utf8 strings are not symbols and vice versa")
+(assert (not= 🦊 "🦊") "utf8 strings are not symbols and vice versa")
 
 # Symbols with @ character
 
diff --git a/test/suite1.dst b/test/suite1.dst
index ef1b2b5a..affa737b 100644
--- a/test/suite1.dst
+++ b/test/suite1.dst
@@ -80,16 +80,16 @@
 (defn fiberstuff []
   (++ myvar)
   (def f (fiber.new (fn [] (++ myvar) (debug) (++ myvar))))
-  (fiber.resume f)
+  (resume f)
   (++ myvar))
 
 (def myfiber (fiber.new fiberstuff :dey))
 
 (assert (= myvar 0) "fiber creation does not call fiber function")
-(fiber.resume myfiber)
+(resume myfiber)
 (assert (= myvar 2) "fiber debug statement breaks at proper point")
 (assert (= (fiber.status myfiber) :debug) "fiber enters debug state")
-(fiber.resume myfiber)
+(resume myfiber)
 (assert (= myvar 4) "fiber resumes properly from debug state")
 (assert (= (fiber.status myfiber) :dead) "fiber properly dies from debug state")