diff --git a/home.nix b/home.nix
index 9936dcb..9f2cf71 100644
--- a/home.nix
+++ b/home.nix
@@ -49,6 +49,10 @@
       bindkey "^[OA" up-line-or-beginning-search
       bindkey "^[OB" down-line-or-beginning-search
 
+      function gc() {
+        sudo nix-collect-garbage --delete-older-than "''${1:-14}d"
+      }
+
       function mkenv() {
         local template="$HOME/nixos-dotfiles/templates/shell-''${1}.nix"
         if [[ -z "$1" ]]; then