colemickens / nixos-cosmic

Flake for testing COSMIC on NixOS

NixOS COSMIC

Nix package set and NixOS module for using COSMIC from NixOS. This is a temporary repository for testing COSMIC on NixOS as it is developed. When COSMIC gets more stable and it is fully working on NixOS, these packages and module are intended to be merged upstream into nixpkgs.

Usage

Flakes

If you have an existing configuration.nix, you can use the nixos-cosmic flake with the following:

{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";

    nixos-cosmic = {
      url = "github:lilyinstarlight/nixos-cosmic";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = { self, nixpkgs, nixos-cosmic }: {
    nixosConfigurations = {
      # NOTE: change "host" to your system's hostname
      host = nixpkgs.lib.nixosSystem {
        modules = [
          {
            nix.settings = {
              substituters = [ "https://cosmic.cachix.org/" ];
              trusted-public-keys = [ "cosmic.cachix.org-1:Dya9IyXD4xdBehWjrkPv6rtxpmMdRel02smYzA85dPE=" ];
            };
          }
          nixos-cosmic.nixosModules.default
          ./configuration.nix
        ];
      };
    };
  };
}

After rebuilding with that configuration to get the binary cache substituters set up, enable COSMIC with services.desktopManager.cosmic.enable = true and services.displayManager.cosmic-greeter.enable = true in your NixOS configuration

Troubleshooting

Phantom non-existent display on Nvidia (cosmic-randr#13)

If while using an Nvidia GPU, cosmic-settings and cosmic-randr list show an additional display that can not be disabled, try Nvidia's experimental framebuffer device.

Add to your configuration:

boot.kernelParams = [ "nvidia_drm.fbdev=1" ];