diff --git a/pkgs/build-support/cc-wrapper/add-clang-cc-cflags-before.sh b/pkgs/build-support/cc-wrapper/add-clang-cc-cflags-before.sh
index 51bfeb18f58a..ecbe3d477fa1 100644
--- a/pkgs/build-support/cc-wrapper/add-clang-cc-cflags-before.sh
+++ b/pkgs/build-support/cc-wrapper/add-clang-cc-cflags-before.sh
@@ -6,6 +6,6 @@ for p in "${params[@]}"; do
     esac
 done
 
-if $needsTarget; then
+if $needsTarget && [[ $0 != *cpp ]]; then
     extraBefore+=(-target @defaultTarget@ @machineFlags@)
 fi