diff --git a/justfile b/justfile
index 933b6a0..8b41b1f 100644
--- a/justfile
+++ b/justfile
@@ -1,2 +1,6 @@
 switch:
   darwin-rebuild switch --flake . --show-trace
+delete-old:
+  sudo nix-env --profile /nix/var/nix/profiles/system --delete-generations old
+gc:
+  nix store gc