diff --git a/modules/nix-tools/rebuild.nix b/modules/nix-tools/rebuild.nix
index 491f902..d9c8723 100644
--- a/modules/nix-tools/rebuild.nix
+++ b/modules/nix-tools/rebuild.nix
@@ -87,6 +87,19 @@
             ${echoCmd} "Testing the evaulation of the nixos config for $HOSTNAME"
             ${lib.getExe nix} eval ${flakeDir}#nixosConfigurations.$HOSTNAME.config.system.build.toplevel.drvPath
           '')
+
+          (writeShellScriptBin "cleanup" ''
+            set -e
+            DAYS=$1
+            if [ -z "$DAYS" ]; then
+              ${echoCmd} "usage: cleanup <days>"
+              exit 1
+            fi
+            ${lib.getExe home-manager} expire-generations "-$DAYS days"
+            ${lib.getExe nix} profile wipe-history --older-than "''${DAYS}d"
+            ${lib.getExe nix} store gc
+            ${lib.getExe nix} store optimise
+          '')
         ];
       };
     };