fix

Author: marcoieni

src/ci/scripts/free-disk-space.sh

@@ -129,10 +129,14 @@ removeUnusedFilesAndDirs() {
         # Azure
         "/opt/az"
         "/usr/share/az_"*
+    )
 
+    if [ -n "$AGENT_TOOLSDIRECTORY" ]; then
         # Environment variable set by GitHub Actions
-        "$AGENT_TOOLSDIRECTORY"
-    )
+        to_remove+=(
+            "${AGENT_TOOLSDIRECTORY}"
+        )
+    fi
 
     for element in "${to_remove[@]}"; do
         if [ ! -e "$element" ]; then