diff --git a/.github/workflows/pre-release.yml b/.github/workflows/pre-release.yml
index e9979b0699..92cee17c12 100644
--- a/.github/workflows/pre-release.yml
+++ b/.github/workflows/pre-release.yml
@@ -6,6 +6,10 @@ on:
     tags:
       - 'pre-*'
 
+env:
+  CGO_CFLAGS: "-O -D__BLST_PORTABLE__"
+  CGO_CFLAGS_ALLOW: "-O -D__BLST_PORTABLE__"
+
 jobs:
   build:
     name: Build Release
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index e771923e56..18f043788b 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -5,6 +5,9 @@ on:
     # Publish `v1.2.3` tags as releases.
     tags:
       - v*
+env:
+  CGO_CFLAGS: "-O -D__BLST_PORTABLE__"
+  CGO_CFLAGS_ALLOW: "-O -D__BLST_PORTABLE__"
 
 jobs:
   build: