diff --git a/mk/rustpkg.mk b/mk/rustpkg.mk
index 2088f03ac7e..e2b5eaafe30 100644
--- a/mk/rustpkg.mk
+++ b/mk/rustpkg.mk
@@ -12,11 +12,11 @@ DO_CLEAN_$(1) = rm -rf $$(DONE_$(1)) $(CFG_BUILD_HOME)/workspace/build/$(CFG_TAR
 
 EXTRA_RFLAGS_$(1) =
 
-ifeq ($(shell uname -s),Darwin)
-ifeq ($(shell sw_vers | grep -c 10.6),1)
+ifeq ($$(shell uname -s),Darwin)
+ifeq ($$(shell sw_vers | grep -c 10.6),1)
 EXTRA_RFLAGS_$(1) += --cfg mac_10_6
 endif
-ifeq ($(shell sw_vers | grep -c 10.7),1)
+ifeq ($$(shell sw_vers | grep -c 10.7),1)
 EXTRA_RFLAGS_$(1) += --cfg mac_10_7
 endif
 else