diff --git a/.github/workflows/pip.yml b/.github/workflows/pip.yml
index b66a1f2869..fe1d3e9b6d 100644
--- a/.github/workflows/pip.yml
+++ b/.github/workflows/pip.yml
@@ -64,15 +64,13 @@ jobs:
 
       - name: Pip install
         run: |
-          pwd
-          ls
-          ls pip_venv
           ln -s /__w/firedrake/firedrake/src pip_venv/
           source pip_venv/bin/activate
           cd pip_venv/src
           export CC="$MPICH_DIR/mpicc"
           export CXX="$MPICH_DIR/mpicxx"
           export MPICC="$MPICH_DIR/mpicc"
+          export MPI_HOME=$PETSC_DIR/packages
           pip install \
             --log=firedrake-install.log \
             --no-binary mpi4py,h5py \