diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index fc647c4..c46e81d 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -7,7 +7,6 @@ on:
   workflow_dispatch:
 
 env:
-  BRANCH_NAME: ${{ github.ref_name }}
   CCACHE_BASEDIR: ${{ github.workspace }}
 
 jobs:
@@ -15,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 120
     container:
-      image: git.romainboullard.com/bigfootdev/linuxcppbuilder:${{ env.BRANCH_NAME }}
+      image: git.romainboullard.com/bigfootdev/linuxcppbuilder:${{ github.ref_name }}
     defaults:
       run:
         shell: bash