diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 52177f47..be62831b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -10,11 +10,10 @@ jobs:
     name: Build CentOS 6 artifacts
     runs-on: ubuntu-latest
     container: centos:6
-    env:
-      SHA8: ${GITHUB_SHA::8}
     steps:
       - name: Prepare CentOS 6 tools
         run: |
+          echo ${GITHUB_REF:10}
           yum install -y --nogpgcheck git cmake3 make openssl-devel libmicrohttpd-devel centos-release-scl-rh devtoolset-6-gcc devtoolset-6-binutils devtoolset-6-gcc-c++
           rpm -i https://github.com/sipcapture/captagent/raw/master/dependency/centos/6/libuv-1.8.0-1.el6.x86_64.rpm
           rpm -i https://github.com/sipcapture/captagent/raw/master/dependency/centos/6/libuv-devel-1.8.0-1.el6.x86_64.rpm