diff --git a/Makefile b/Makefile
index a56562b..6f79710 100644
--- a/Makefile
+++ b/Makefile
@@ -29,6 +29,9 @@ rebuild-build:
 rebuild-switch:
 	$(TIME) time nixos-rebuild switch --fallback  --show-trace
 
+show-diff-with-current:
+	-diff /run/current-system/configuration.nix /etc/nixos/configuration.nix
+
 show-roots:
 	nix-store --gc --print-roots