diff --git a/backend/windmill-worker/src/python_executor.rs b/backend/windmill-worker/src/python_executor.rs
index 354ff0b8dc..eb6a6e7f30 100644
--- a/backend/windmill-worker/src/python_executor.rs
+++ b/backend/windmill-worker/src/python_executor.rs
@@ -852,6 +852,7 @@ mount {{
         {
             python_cmd.env("SystemRoot", SYSTEM_ROOT.as_str());
             python_cmd.env("USERPROFILE", crate::USERPROFILE_ENV.as_str());
+            python_cmd.env("windir", SYSTEM_ROOT.as_str());
             python_cmd.env(
                 "LOCALAPPDATA",
                 std::env::var("LOCALAPPDATA")