diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a1047150e..6ae59b34a 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -15,6 +15,7 @@ jobs:
     - name: cmake
       env:
         CMAKE_CXX_STANDARD: 11
+        PKG_CONFIG_PATH: /usr/local/opt/libffi/lib/pkgconfig:/usr/local/opt/expat/lib/pkgconfig
       run: |
         cmake \
           -DCMAKE_BUILD_TYPE="release" \