diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 461dfc63..a2517052 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -65,9 +65,14 @@ jobs:
     uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@main
     needs: [ data ]
     with:
+      libraries: |
+        brew:
+          - eigen
+          - fftw
       setenv: |
         WEBBPSF_PATH: ${{ needs.data.outputs.webbpsf_path }}
         GALSIM_CAT_PATH: ${{ needs.data.outputs.galsim_cat_path }}
+        FFTW_DIR: /opt/homebrew/opt/fftw/lib/
       cache-path: ${{ needs.data.outputs.path }}
       cache-key: data-${{ needs.data.outputs.hash }}
       envs: |
diff --git a/.github/workflows/ci_cron.yml b/.github/workflows/ci_cron.yml
index 67e653e5..5da51270 100644
--- a/.github/workflows/ci_cron.yml
+++ b/.github/workflows/ci_cron.yml
@@ -54,9 +54,14 @@ jobs:
     uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@main
     needs: [ data ]
     with:
+      libraries: |
+        brew:
+          - eigen
+          - fftw
       setenv: |
         WEBBPSF_PATH: ${{ needs.data.outputs.webbpsf_path }}
         GALSIM_CAT_PATH: ${{ needs.data.outputs.galsim_cat_path }}
+        FFTW_DIR: /opt/homebrew/opt/fftw/lib/
       cache-path: ${{ needs.data.outputs.path }}
       cache-key: data-${{ needs.data.outputs.hash }}
       envs: |
diff --git a/tox.ini b/tox.ini
index 5402bc03..24a8c13d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -48,6 +48,8 @@ pass_env =
     CODECOV_*
     WEBBPSF_PATH
     GALSIM_CAT_PATH
+    FFTW_DIR
+    LIBRARY_PATH
 extras =
     test
 deps =