diff --git a/projects/gnu.org/gcc/package.yml b/projects/gnu.org/gcc/package.yml
index 2b664d80..69a136fa 100644
--- a/projects/gnu.org/gcc/package.yml
+++ b/projects/gnu.org/gcc/package.yml
@@ -128,7 +128,7 @@ test:
   - gcc -dumpspecs
   # gha mac runners have broken SDKs...
   - run: |
-      if ! -f /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/AvailabilityInternalLegacy.h; then
+      if ! test -f /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/AvailabilityInternalLegacy.h; then
         echo "Missing SDK; skipping remaining tests"
         exit 0
       fi