diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 7b06f6b..efdd881 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -101,7 +101,7 @@ jobs:
             extras: [ test ]
             commands: [
               'curl -L https://stsci.box.com/shared/static/ntb71b3uusf1kzgf9bss0hzbreoja5gg.gz -o webbpsf-data.gz',
-              'tar -xvzf webbpsf-data.gz -C ${{ env.DATA_DIRECTORY }}',
+              'tar -xvzf webbpsf-data.gz -C $DATA_DIRECTORY',
             ]
             data: true
     steps: