diff --git a/Makefile b/Makefile
index 4a7e238..11694f2 100644
--- a/Makefile
+++ b/Makefile
@@ -33,6 +33,7 @@ setup-fido:
 	systemd-cryptenroll --fido2-device=auto /dev/disk/by-partlabel/disk-main-luks
 
 install:
+	nix-collect-garbage --delete-old
 	env NIXPKGS_ALLOW_BROKEN=1 nixos-rebuild switch --flake .#ziltis-desktop --impure --show-trace
 
 # end