diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index 51a3c182..5e7363c0 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -30,6 +30,9 @@ jobs:
       - run: |
           cmake -S . -B build
           cd build
+          export PATH="$(brew --prefix flex)/bin:$PATH"
+          export PATH="$(brew --prefix bison)/bin:$PATH"
+          export PATH="$(brew --prefix tcl-tk)/bin:$PATH"
           make
           sudo make install
       - run: |