View source for Cleaning the nix store

Sometimes your store fills up the disk, but a simple
<syntaxhighlight>nix-store --gc</syntaxhighlight>
does not seem to clean all that much.

This usually means that you have some old collection roots that keep old versions of nixpkgs around.

Sometimes <code>result</code> files created by an ad-hoc <code>nix-build</code> bind a lot of resources, these can be found by running:

<syntaxhighlight>
  nix-store --gc --print-roots | egrep -v "^(/nix/var|/run/\w+-system|\{memory|/proc)"
</syntaxhighlight>

Additional Resources about cleaning up the ''nix-store'':

* https://matthewrhone.dev/nixos-package-guide#cleanup-old-packages-user-wide
* https://nixos.wiki/wiki/Storage_optimization
* https://old.reddit.com/r/NixOS/comments/8m1n3d/taking_out_the_trash/

There are multiple tools that can help with discovering ''gcroots'' and calculate the disk size:

* https://github.com/symphorien/nix-du
* https://github.com/utdemir/nix-tree
* https://github.com/cdepillabout/nix-query-tree-viewer
* https://github.com/craigmbooth/nix-visualize