diff --git a/.github/workflows/build-base-image.yml b/.github/workflows/build-base-image.yml
index b35b50e..c886b97 100644
--- a/.github/workflows/build-base-image.yml
+++ b/.github/workflows/build-base-image.yml
@@ -72,6 +72,7 @@ jobs:
             TX_DOCKER_VERSION=${{ github.sha }}
             TX_RELEASE_TAG=dev-${{ steps.release_info.outputs.date }}
             TX_RELEASE_DATE=${{ steps.release_info.outputs.date }}
+            TX_MPI_VERSION=${{ matrix.mpiversion }}
           push: true
           # We use three tags for release builds:
           # txpipe-dev