diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a24200c24..422bafa0f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -21,10 +21,10 @@ jobs:
         pwd
         ls
         cd openmptcprouter
-        git checkout ${GITHUB_REF} || true
+        git checkout ${{ github.sha }} || true
         git pull || true
         export OMR_FEED_URL="https://github.com/ysurac/openmptcprouter-feeds"
-        export OMR_FEED_SRC="${GITHUB_REF}"
+        export OMR_FEED_SRC="${{ github.sha }}"
         pwd
         ls
         sh build.sh prepare {tools,toolchain}/install -j6