diff --git a/mkfile b/mkfile
index 92628c3..13206b8 100644
--- a/mkfile
+++ b/mkfile
@@ -9,7 +9,8 @@ default:V:
 
 rebuild:V:
     git pull --rebase
-    exec sudo nixos-rebuild switch --flake $gitroot
+    sudo nixos-rebuild switch --flake $gitroot
+    mk clean
 
 upgrade:V:
     nix flake update --flake $gitroot