diff --git a/Makefile b/Makefile
index 907009b4..f8dbc8c1 100644
--- a/Makefile
+++ b/Makefile
@@ -227,6 +227,7 @@ install: $(JANET_TARGET)
 	mkdir -p $(JANET_PATH)
 	cp tools/cook.janet $(JANET_PATH)
 	cp tools/highlight.janet $(JANET_PATH)
+	cp tools/bars.janet $(JANET_PATH)
 	mkdir -p $(MANPATH)
 	cp janet.1 $(MANPATH)
 
diff --git a/tools/cook.janet b/tools/cook.janet
index 7de26579..97d24fa6 100644
--- a/tools/cook.janet
+++ b/tools/cook.janet
@@ -94,7 +94,11 @@
 (def OPTIMIZE 2)
 (def CC (if is-win "cl" "cc"))
 (def LD (if is-win "link" (string CC " -shared")))
-(def CFLAGS (string (if is-win "/O" "-std=c99 -Wall -Wextra -fpic -O") OPTIMIZE))
+(def CFLAGS (string
+              (if is-win "/I" "-I")
+              module/*headerpath*
+              (if is-win " /O" " -std=c99 -Wall -Wextra -fpic -O")
+              OPTIMIZE))
 
 (defn- compile-c
   "Compile a C file into an object file."