NixOS installation media with CachyOS kernel

flake.lock

{
  "nodes": {
    "chaotic": {
      "inputs": {
        "flake-schemas": "flake-schemas",
        "home-manager": "home-manager",
        "jovian": "jovian",
        "nixpkgs": "nixpkgs"
      },
      "locked": {
        "lastModified": 1733919451,
        "narHash": "sha256-CDz8tg4Qf85qzPhjSOwelxl1TAwn/T9IX9dO06OKi3g=",
        "owner": "chaotic-cx",
        "repo": "nyx",
        "rev": "b95d66a950fd7b9d72a5ee6ee911cc3080b81997",
        "type": "github"
      },
      "original": {
        "owner": "chaotic-cx",
        "ref": "nyxpkgs-unstable",
        "repo": "nyx",
        "type": "github"
      }
    },
    "flake-schemas": {
      "locked": {
        "lastModified": 1721999734,
        "narHash": "sha256-G5CxYeJVm4lcEtaO87LKzOsVnWeTcHGKbKxNamNWgOw=",
        "rev": "0a5c42297d870156d9c57d8f99e476b738dcd982",
        "revCount": 75,
        "type": "tarball",
        "url": "https://api.flakehub.com/f/pinned/DeterminateSystems/flake-schemas/0.1.5/0190ef2f-61e0-794b-ba14-e82f225e55e6/source.tar.gz"
      },
      "original": {
        "type": "tarball",
        "url": "https://flakehub.com/f/DeterminateSystems/flake-schemas/%3D0.1.5.tar.gz"
      }
    },
    "home-manager": {
      "inputs": {
        "nixpkgs": [
          "chaotic",
          "nixpkgs"
        ]
      },
      "locked": {
        "lastModified": 1733484277,
        "narHash": "sha256-i5ay20XsvpW91N4URET/nOc0VQWOAd4c4vbqYtcH8Rc=",
        "owner": "nix-community",
        "repo": "home-manager",
        "rev": "d00c6f6d0ad16d598bf7e2956f52c1d9d5de3c3a",
        "type": "github"
      },
      "original": {
        "owner": "nix-community",
        "repo": "home-manager",
        "type": "github"
      }
    },
    "jovian": {
      "inputs": {
        "nix-github-actions": "nix-github-actions",
        "nixpkgs": [
          "chaotic",
          "nixpkgs"
        ]
      },
      "locked": {
        "lastModified": 1733491721,
        "narHash": "sha256-n4fTKTYXeGRngeanNDxSxbuWSRCQ6l74IwOBlqp8dcw=",
        "owner": "Jovian-Experiments",
        "repo": "Jovian-NixOS",
        "rev": "0f415721ee427270bc078ef3a5ba2a308d47461f",
        "type": "github"
      },
      "original": {
        "owner": "Jovian-Experiments",
        "repo": "Jovian-NixOS",
        "type": "github"
      }
    },
    "nix-github-actions": {
      "inputs": {
        "nixpkgs": [
          "chaotic",
          "jovian",
          "nixpkgs"
        ]
      },
      "locked": {
        "lastModified": 1729697500,
        "narHash": "sha256-VFTWrbzDlZyFHHb1AlKRiD/qqCJIripXKiCSFS8fAOY=",
        "owner": "zhaofengli",
        "repo": "nix-github-actions",
        "rev": "e418aeb728b6aa5ca8c5c71974e7159c2df1d8cf",
        "type": "github"
      },
      "original": {
        "owner": "zhaofengli",
        "ref": "matrix-name",
        "repo": "nix-github-actions",
        "type": "github"
      }
    },
    "nixpkgs": {
      "locked": {
        "lastModified": 1733759999,
        "narHash": "sha256-463SNPWmz46iLzJKRzO3Q2b0Aurff3U1n0nYItxq7jU=",
        "owner": "NixOS",
        "repo": "nixpkgs",
        "rev": "a73246e2eef4c6ed172979932bc80e1404ba2d56",
        "type": "github"
      },
      "original": {
        "owner": "NixOS",
        "ref": "nixos-unstable",
        "repo": "nixpkgs",
        "type": "github"
      }
    },
    "root": {
      "inputs": {
        "chaotic": "chaotic",
        "nixpkgs": [
          "chaotic",
          "nixpkgs"
        ]
      }
    }
  },
  "root": "root",
  "version": 7
}

flake.nix

# nix build .#nixosConfigurations.cachyosIso.config.system.build.isoImage
{
  description = "NixOS installation media with CachyOS kernel";
  inputs = {
    chaotic.url = "github:chaotic-cx/nyx/nyxpkgs-unstable";
    nixpkgs.follows = "chaotic/nixpkgs";
  };
  outputs = { self, nixpkgs, chaotic }: {
    nixosConfigurations = {
      cachyosIso = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
        modules = [
          "${nixpkgs}/nixos/modules/installer/cd-dvd/installation-cd-minimal.nix"
          chaotic.nixosModules.default
          ({ pkgs, lib, ... }: {
            boot.kernelPackages = pkgs.linuxPackages_cachyos;
            boot.zfs.package = lib.mkOverride 99 pkgs.zfs_cachyos;
          })
        ];
      };
    };
  };
  nixConfig = {
    extra-substituters = [ "https://nyx.chaotic.cx/" ];
    extra-trusted-public-keys = [
      "nyx.chaotic.cx-1:HfnXSw4pj95iI/n17rIDy40agHj12WfF+Gqk6SonIT8="
      "chaotic-nyx.cachix.org-1:HfnXSw4pj95iI/n17rIDy40agHj12WfF+Gqk6SonIT8="
    ];
  };
}