diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 3ef54a15cf..5ce2518b07 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -92,6 +92,7 @@ jobs:
             --no-binary h5py \
             --extra-index-url https://download.pytorch.org/whl/cpu \
             './firedrake-repo[ci]'
+          pip install -I "fenics-fiat @ git+https://github.com/firedrakeproject/fiat.git@pbrubeck/fix/ref-complex"
           firedrake-clean
           pip list