machine_setup/nix/configuration/flake.nix

{
  description = "My system configuration";

  inputs = {
    impermanence.url = "github:nix-community/impermanence";
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.11";
    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
    nixpkgs-b93b4e9b5.url = "github:NixOS/nixpkgs/b93b4e9b527904aadf52dba6ca35efde2067cbd4";
    home-manager.url = "github:nix-community/home-manager/release-24.11";
    home-manager.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs = { self, nixpkgs, nixpkgs-unstable, nixpkgs-b93b4e9b5, impermanence, home-manager, ... }@inputs: let
    base-system = {};
  in
    {
      nixosConfigurations.odo = nixpkgs.lib.nixosSystem rec {
        system = "x86_64-linux";
        specialArgs = {
          pkgs-b93b4e9b5 = import nixpkgs-b93b4e9b5 {
            inherit system;
            # config.allowUnfree = true;
          };
          pkgs-unstable = import nixpkgs-unstable {
            inherit system;
            # config.allowUnfree = true;
          };
        };
        modules = [
          impermanence.nixosModules.impermanence
          home-manager.nixosModules.home-manager
          {
            home-manager.useGlobalPkgs = true;
            home-manager.useUserPackages = true;
          }
          ./configuration.nix
        ];
      };
      nixosConfigurations.odovm = nixpkgs.lib.nixosSystem rec {
        system = "x86_64-linux";
        specialArgs = {
          pkgs-b93b4e9b5 = import nixpkgs-b93b4e9b5 {
            inherit system;
            # config.allowUnfree = true;
          };
          pkgs-unstable = import nixpkgs-unstable {
            inherit system;
            # config.allowUnfree = true;
          };
        };
        modules = [
          impermanence.nixosModules.impermanence
          home-manager.nixosModules.home-manager
          {
            home-manager.useGlobalPkgs = true;
            home-manager.useUserPackages = true;
          }
          ./configuration.nix
          ({lib, ...}: {
            networking.dhcpcd.enable = lib.mkForce true;
            networking.useDHCP = lib.mkForce true;
            boot.loader.efi.canTouchEfiVariables = lib.mkForce true;
          })
        ];
      };
      nixosConfigurations.odoqemu = nixpkgs.lib.nixosSystem rec {
        system = "x86_64-linux";
        specialArgs = {
          pkgs-b93b4e9b5 = import nixpkgs-b93b4e9b5 {
            inherit system;
            # config.allowUnfree = true;
          };
          pkgs-unstable = import nixpkgs-unstable {
            inherit system;
            # config.allowUnfree = true;
          };
        };
        modules = [
          impermanence.nixosModules.impermanence
          home-manager.nixosModules.home-manager
          {
            home-manager.useGlobalPkgs = true;
            home-manager.useUserPackages = true;
          }
          ./configuration.nix
          ({lib, ...}: {
            imports = [ <nixpkgs/nixos/modules/virtualisation/qemu-vm.nix> ];
            virtualisation.qemu.options = [
              "-device virtio-vga"
            ];
            virtualisation.vmVariant = {
              # following configuration is added only when building VM with build-vm
              virtualisation = {
                memorySize = 2048; # Use 2048MiB memory.
                cores = 3;
                graphics = false;
              };
            };
            networking.dhcpcd.enable = lib.mkForce true;
            networking.useDHCP = lib.mkForce true;
            boot.loader.efi.canTouchEfiVariables = lib.mkForce true;
            # doas nixos-rebuild build-vm --flake .#odoqemu
            #./result/bin/run-nixos-vm
          })
        ];
      };
    };
}