diff --git a/Makefile b/Makefile
index 001d2ad1895..b0045dc8ec8 100644
--- a/Makefile
+++ b/Makefile
@@ -24,7 +24,9 @@ LEVEL := .
 # "llvmCore", then this is an "Apple-style" build; search for
 # "Apple-style" in the comments for more info.  Anything else is a
 # normal build.
-ifneq ($(RC_ProjectName),llvmCore)  # Normal build (not "Apple-style").
+#ifneq ($(RC_ProjectName),llvmCore)  # Normal build (not "Apple-style").
+ifneq ($(findstring llvmCore, $(RC_ProjectName)),llvmCore)  # Normal build (not "Apple-style").
+
 ifeq ($(BUILD_DIRS_ONLY),1)
   DIRS := lib/System lib/Support utils
   OPTIONAL_DIRS :=