diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index b415f04142..573961f294 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -87,11 +87,14 @@ jobs:
       - name: Build
         # Use blst tag to allow go and bazel builds for blst.
         run: go build -v ./...
-
+        env: 
+           CGO_CFLAGS: "-O -D__BLST_PORTABLE__"
         # fuzz leverage go tag based stubs at compile time.
         # Building and testing with these tags should be checked and enforced at pre-submit.
       - name: Test for fuzzing
         run: go test  -tags=fuzz,develop ./...  -test.run=^Fuzz
+        env: 
+           CGO_CFLAGS: "-O -D__BLST_PORTABLE__"
 
 # Tests run via Bazel for now...
 #      - name: Test