diff --git a/projects/Makefile b/projects/Makefile
index f2a604a55fb..0997a2a3817 100644
--- a/projects/Makefile
+++ b/projects/Makefile
@@ -18,4 +18,10 @@ DIRS := $(filter-out Stacker, $(DIRS))
 DIRS := $(filter-out sample, $(DIRS))
 endif
 
+
+# Universal builds can't build stacker, which uses llvm-gcc -S.
+ifdef UNIVERSAL
+DIRS := $(filter-out Stacker, $(DIRS))
+endif
+
 include $(PROJ_SRC_ROOT)/Makefile.rules