diff --git a/.github/workflows/mac-ci.yml b/.github/workflows/mac-ci.yml
index d68ab42..bd83a5e 100644
--- a/.github/workflows/mac-ci.yml
+++ b/.github/workflows/mac-ci.yml
@@ -17,6 +17,7 @@ jobs:
       run: |
         brew update
         brew install tcl-tk || true
+	ls -lR /usr/local/opt/tcl-tk
         sudo mkdir -p /usr/local/include /usr/local/lib /usr/local/bin
         sudo ln -sf /usr/local/opt/tcl-tk/include /usr/local/include/tcl8.6
         sudo rm -f /usr/local/lib/libtcl* || true