diff --git a/umu/__main__.py b/umu/__main__.py
index 74ca71800..21ea6d791 100644
--- a/umu/__main__.py
+++ b/umu/__main__.py
@@ -3,10 +3,10 @@
 from zipfile import is_zipfile
 
 if not is_zipfile(os.path.dirname(__file__)):  # noqa: PTH120
-    sys.path = [
+    sys.path.insert(
+        0,
         f"{os.path.dirname(os.path.realpath(__file__, strict=True))}/_vendor",  # noqa: PTH120
-        *sys.path,
-    ]
+    )
 
 from argparse import ArgumentParser, Namespace, RawTextHelpFormatter