diff --git a/install.sh b/install.sh
index 1e1d0c3..1a5b7ef 100755
--- a/install.sh
+++ b/install.sh
@@ -211,8 +211,13 @@ echo "✅ Extraction completed"
 sudo_if_install_dir_not_writeable() {
     local command="$1"
     local exit_code
-    if [ -w "$INSTALL_DIR" ]; then
-        # Directory is writable, run without sudo
+    local check_dir="$INSTALL_DIR"
+    # Walk up to find the first existing ancestor to check writability
+    while [ -n "$check_dir" ] && [ "$check_dir" != "/" ] && [ ! -e "$check_dir" ]; do
+        check_dir="$(dirname "$check_dir")"
+    done
+    if [ -w "$check_dir" ]; then
+        # Directory (or its ancestor) is writable, run without sudo
         sh -c "$command"
     else
         # Directory requires elevated privileges