Nix flake: how to apply patches?

[postsolar]

Hi, I'm trying to use Helix like this with Home Manager on Nix OS:

  { programs.helix = {
      enable = true;
      package =
        inputs.helix.packages.${system}.helix.overrideAttrs
          (oldAttrs: {
            patches = [ ./unbind_default_keys.patch ];      # ← relevant line
          });
    };
  } // configFiles

but this patch isn't being applied. It would get applied if I use inputs.helix.packages.${system}.helix-unwrapped, but then the grammars won't be installed. Is there a way to apply patches to the wrapped package?

[ian-h-chamberlain]

I know this is pretty old, but this is what I did using the flake input and it worked for me! Getting patches to stack correctly is my next issue though...

nixpkgs.overlays = [
  helix-editor.overlays.default
  (final: prev: {
    helix = prev.helix.overrideAttrs (old: {
      patches = old.patches ++ [
        # add same_line and anchored movements
        (prev.fetchpatch {
          url = "https://github.com/helix-editor/helix/pull/10576.patch";
          hash = "sha256-g+Nsz5fRsS+Rr/T1XTN21aiKQKATwRWXL+CfpOGBfyc=";
        })
      ];
    });
  )
];