diff --git a/runtime/Makefile b/runtime/Makefile
index a1b89af..6e25967 100644
--- a/runtime/Makefile
+++ b/runtime/Makefile
@@ -7,6 +7,8 @@
 # 
 ##===----------------------------------------------------------------------===##
 
+ifndef NO_RUNTIME_LIBS
+
 LEVEL = ..
 include $(LEVEL)/Makefile.config
 
@@ -22,3 +24,4 @@
 
 install::
 
+endif
diff --git a/utils/buildit/build_llvm b/utils/buildit/build_llvm
index 9b2d8d3..e432e5b 100755
--- a/utils/buildit/build_llvm
+++ b/utils/buildit/build_llvm
@@ -148,6 +148,7 @@
 fi
 
 make $JOBS_FLAG $OPTIMIZE_OPTS UNIVERSAL=1 UNIVERSAL_ARCH="$TARGETS" \
+    NO_RUNTIME_LIBS=1 \
     LLVM_SUBMIT_VERSION=$LLVM_SUBMIT_VERSION \
     LLVM_SUBMIT_SUBVERSION=$LLVM_SUBMIT_SUBVERSION \
     CXXFLAGS="-DLLVM_VERSION_INFO='\" Apple Build #$LLVM_VERSION\"'" \
@@ -171,6 +172,7 @@
 
 # Install the tree into the destination directory.
 make $LOCAL_MAKEFLAGS $OPTIMIZE_OPTS UNIVERSAL=1 UNIVERSAL_ARCH="$TARGETS" \
+    NO_RUNTIME_LIBS=1 \
     LLVM_SUBMIT_VERSION=$LLVM_SUBMIT_VERSION \
     LLVM_SUBMIT_SUBVERSION=$LLVM_SUBMIT_SUBVERSION \
     OPTIMIZE_OPTION='-O3' VERBOSE=1 install