diff --git a/contrib/guix/libexec/build.sh b/contrib/guix/libexec/build.sh
index 57108be8f1a5b..504f4b2afb0bd 100755
--- a/contrib/guix/libexec/build.sh
+++ b/contrib/guix/libexec/build.sh
@@ -60,7 +60,9 @@ store_path() {
 
 # Set environment variables to point the NATIVE toolchain to the right
 # includes/libs
-NATIVE_GCC="$(store_path gcc)"
+echo ----------------------------------------------------------------
+grep --extended-regexp "/[^-]{32}-gcc-[^-]+" "${GUIX_ENVIRONMENT}/manifest"
+# NATIVE_GCC="$(store_path gcc)"
 
 echo NATIVE_GCC=${NATIVE_GCC}
 ls -l ${NATIVE_GCC}