diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index 28dec4d..83a277f 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -72,6 +72,8 @@ jobs:
           mamba install fsl-avwutils
           mamba env config vars set FSLDIR="$CONDA_PREFIX"
           mamba env config vars set FSLOUTPUTTYPE="NIFTI_GZ"
+          # Hack because we're not doing a full FSL install
+          echo "6.0.7.9" > $CONDA_PREFIX/fslversion
       - name: Upgrade pip
         run: |
           python -m pip install --upgrade pip