diff --git a/programs/bash.nix b/programs/bash.nix
index 69b726d..76dcfab 100644
--- a/programs/bash.nix
+++ b/programs/bash.nix
@@ -51,6 +51,8 @@
       toupper = "tr [:lower:] [:upper:]";
       tolower = "tr [:upper:] [:lower:]";
       rebuild = if (os == "linux") then '' 
+        sudo nix-collect-garbage --delete-older-than 30d &&
+        sudo nix-env -p /nix/var/nix/profiles/system --delete-generations +10 &&
         cd $HOME/.local/os &&
         git pull &&
         nix flake update --commit-lock-file &&
@@ -60,6 +62,7 @@
         git push &&
         cd -
       '' else ''
+        nix-collect-garbage --delete-older-than 30d &&
         cd $HOME/.local/os &&
         git pull &&
         nix flake update --commit-lock-file &&