diff --git a/upstream_utils/update_mpack.py b/upstream_utils/update_mpack.py
index 017ba60d63e..974587dc872 100755
--- a/upstream_utils/update_mpack.py
+++ b/upstream_utils/update_mpack.py
@@ -3,6 +3,7 @@
 import os
 import shutil
 import subprocess
+import tempfile
 
 from upstream_utils import (
     get_repo_root,
@@ -40,9 +41,9 @@ def clone(url, tag):
     subprocess.run(["git", "switch", "--detach", tag])
 
 def main():
+    wpilib_root = get_repo_root()
     clone("https://github.com/ludocode/mpack", "v1.1.1")
     upstream_root = os.getcwd()
-    wpilib_root = get_repo_root()
     wpiutil = os.path.join(wpilib_root, "wpiutil")
 
     # Apply patches to upstream Git repo