Add arguments to gui applications

In previous distros, I would copy the .desktop file to ~/.local/share/applications and then edit it to add things like –enable-features=TouchpadOverscrollHistoryNavigation to my chrome startup command on the Exec line.

How do I go about this? I found the desktop file in a specific location in the store. Is there a way to add these sorts of things to the config file declaratively?

well you can still do the manual method but to have things declarative you can modify the desktop file with an overlay

Looks like chromium browsers have an argument for commandLineArgs

https://nixos.wiki/wiki/Overlays#Examples_of_overlays

If you’re using home-manager it has an option already to provide extra arguments to chromium based browsers

https://nix-community.github.io/home-manager/options.html#opt-programs.chromium.commandLineArgs

Interesting. I applied this overlay with two different package names (different chromium browsers). Vivaldi worked, and Brave did not. Meaning, it built, but Brave did not add the commandlinearg while Vivaldi did.

Any ideas why that would be? Just substituted the word brave for the word vivaldi.

  nixpkgs.overlays = [
    (self: super: {
      brave = super.brave.override {
        commandLineArgs =
          "--enable-features=TouchpadOverscrollHistoryNavigation";
      };
    })
  ];

Edit: Also doesn’t work with google-chrome. Which I would have thought would be the main one working.

It looks like someone accidentally put the commandLineArgs part in with the vulkanSupport optional string part

Resolved here: brave: fix commandLineArgs option also requiring vulkanSupport by 06kellyjac · Pull Request #202555 · NixOS/nixpkgs · GitHub

Another approach is to create a Nix function to wrap the package and replace the .desktop file. I do something similar with an nvidia offload rendering script; I wrap the executables. erosanix/nvidia-offload-wrapper.nix at b1aa1916f22b53ae24ffcb96a7a7d4f85e1337c9 · emmanuelrosa/erosanix · GitHub

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