diff --git a/Makefile b/Makefile
index 9d4261d..5900c5c 100644
--- a/Makefile
+++ b/Makefile
@@ -54,10 +54,10 @@ sysexits: build
 		"$$(printf '#include <sysexits.h>\n' \
 			| cpp -M -idirafter "build/include" - \
 			| sed 's/ /\n/g' | grep sysexits.h)" \
-		| $(RUSTC) $(RUSTCFLAGS) --crate-type lib -o build/o/libsysexits.rlib -
+		| $(RUSTC) $(RUSTFLAGS) --crate-type lib -o build/o/libsysexits.rlib -
 
 libgetopt: src/getopt-rs/lib.rs
-	$(RUSTC) $(RUSTCFLAGS) --crate-type=lib --crate-name=getopt \
+	$(RUSTC) $(RUSTFLAGS) --crate-type=lib --crate-name=getopt \
 		-o build/o/libgetopt.rlib src/getopt-rs/lib.rs
 
 .PHONY: dj