diff --git a/.github/actions/setup-lisp/action.yml b/.github/actions/setup-lisp/action.yml
index 9427939..4f1fa57 100644
--- a/.github/actions/setup-lisp/action.yml
+++ b/.github/actions/setup-lisp/action.yml
@@ -28,7 +28,7 @@ runs:
         if [[ "$RUNNER_OS" == "Linux" ]]; then
             sudo apt-get -y install git build-essential automake libcurl4-openssl-dev
         fi
-        if [[ "$OS" == "macos-latest" ]]; then
+        if [[ "$RUNNER_OS" == "macOS" ]]; then
             brew install automake autoconf curl
         fi