diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 2d8ed37..722b42c 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -40,7 +40,7 @@ jobs:
         run: |
           set -eu
           cd MacPorts
-          ./configure
+          env PATH=/usr/bin:/bin:/usr/sbin:/sbin CFLAGS="-pipe -Os" ./configure
       - name: Build MacPorts Base
         run: |
           set -eu