diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a836024..48f64a6 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -252,7 +252,7 @@ jobs:
           CRDS_SERVER_URL: ${{ matrix.env.CRDS_SERVER_URL }}
           CRDS_PATH: ${{ env.CRDS_PATH }}
           PYSYN_CDBS: ${{ env.PYSYN_CDBS }}
-          WEBBPSF_PATH: ${{ matrix.env.WEBBPSF_PATH }}
+          WEBBPSF_PATH: ${{ env.DATA_DIRECTORY }}/webbpsf-data
   smoke_tests:
     name: run `${{ matrix.package }}` smoke tests in ${{ github.event.inputs.constraint }} Python ${{ matrix.python }} environment on ${{ matrix.os }}
     needs: [ build ]