diff --git a/scripts/Common/OS/setup.fish b/scripts/Common/OS/setup.fish
index 3f014288..30802010 100755
--- a/scripts/Common/OS/setup.fish
+++ b/scripts/Common/OS/setup.fish
@@ -65,6 +65,7 @@ function runSetup
             set -l path "$mountDir/$nixPkgsDir"
             and mkdir -p (dirname "$path")
             and cp -r "$nixPkgsDir" "$path"
+            and git -C "$path" reset --hard
         end
 
         and runHook initOS "Please set up a function `initOS` for initializing the mounted OS and installing valhalla dependencies"