diff --git a/.github/workflows/ZenLib_Checks.yml b/.github/workflows/ZenLib_Checks.yml
index 6d14207..a5af046 100644
--- a/.github/workflows/ZenLib_Checks.yml
+++ b/.github/workflows/ZenLib_Checks.yml
@@ -17,7 +17,7 @@ jobs:
       - name: Dependencies
         run: |
           if [ "$RUNNER_OS" == "macOS" ]; then
-            brew install automake
+            brew install automake libtool
           fi
       - name: Configure
         run: |
diff --git a/Project/GNU/Library/autogen.sh b/Project/GNU/Library/autogen.sh
index 87e6d07..7b742bf 100755
--- a/Project/GNU/Library/autogen.sh
+++ b/Project/GNU/Library/autogen.sh
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 #libtoolize 
-if test "$(uname)" = "Darwin" ; then
+if ! command -v glibtoolize &>/dev/null 2>&1 ; then
   #Darwin based Systems like Mac OS X: libtoolize is called glibtoolize.
   glibtoolize --automake
 else