diff --git a/.github/workflows/package.yml b/.github/workflows/package.yml
index 63d6a90..20d066c 100644
--- a/.github/workflows/package.yml
+++ b/.github/workflows/package.yml
@@ -29,5 +29,5 @@ jobs:
       - name: Package PL/PRQL for PostgreSQL ${{ matrix.pg_version }} (${{ matrix.container }})
         shell: bash
         run: |
-          docker build --build-arg PG_MAJOR_VER="$PG_MAJOR_VER" -t plprql -f ".github/docker/Dockerfile.$DOCKERFILE_ID" .
+          docker build --build-arg PG_MAJOR_VER="$PG_MAJOR_VER" -t plprql -f ".github/docker/Dockerfile.$${{ matrix.container }}" .
           docker run pgrx cargo test --no-default-features --features "pg${PG_MAJOR_VER}"