Attempt to fix workflow

.github/workflows/pytest.yml

@@ -34,8 +34,9 @@ jobs:
       - name: Install dependencies
         run: |
           conda install -c conda-forge pytest pytest-cov
+          conda install -c conda-forge pyfftw
           python -m pip install --upgrade pip
-          pip install pytest-cov setuptools
+          pip install setuptools
           pip install -r requirements.txt
           pip install -e .
       - name: Unit tests