feat: add host 'nixos-unstable' as a testing VM

flake.lock

@@ -50,6 +50,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-unstable": {
+      "locked": {
+        "lastModified": 1751271578,
+        "narHash": "sha256-P/SQmKDu06x8yv7i0s8bvnnuJYkxVGBWLWHaU+tt4YY=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "3016b4b15d13f3089db8a41ef937b13a9e33a8df",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nixpkgs_2": {
       "locked": {
         "lastModified": 1750259320,
@@ -70,7 +86,8 @@
       "inputs": {
         "home-manager": "home-manager",
         "nixos-hardware": "nixos-hardware",
-        "nixpkgs": "nixpkgs_2"
+        "nixpkgs": "nixpkgs_2",
+        "nixpkgs-unstable": "nixpkgs-unstable"
       }
     }
   },

flake.nix

@@ -1,11 +1,12 @@
 {
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
+    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
     home-manager.url = "github:nix-community/home-manager/release-25.05";
     nixos-hardware.url = "github:NixOS/nixos-hardware";
   };
 
-  outputs = inputs @ { self, nixpkgs, ... }: {
+  outputs = inputs @ { self, nixpkgs, nixpkgs-unstable, ... }: {
     nixosConfigurations.affogato = nixpkgs.lib.nixosSystem {
       system = "x86_64-linux";
       modules = [
@@ -13,5 +14,10 @@
       ];
       specialArgs = { inherit inputs; };
     };
+    nixosConfigurations.nixos-unstable = nixpkgs-unstable.lib.nixosSystem {
+      modules = [
+        ./hosts/nixos-unstable
+      ];
+    };
   };
 }

hosts/affogato/default.nix

@@ -11,6 +11,11 @@
     ../../users/leona
   ];
 
+  # add nixpkgs overlay
+  nixpkgs.overlays = [
+    (import ../../pkgs)
+  ];
+
   # Use the systemd-boot EFI boot loader.
   boot.loader.systemd-boot.enable = true;
   boot.loader.efi.canTouchEfiVariables = true;

hosts/nixos-unstable/configuration.nix

@@ -0,0 +1,47 @@
+{ config, lib, pkgs, ... }:
+
+{
+  # Use the systemd-boot EFI boot loader.
+  boot.loader.systemd-boot.enable = true;
+  boot.loader.efi.canTouchEfiVariables = true;
+
+  # Use latest kernel.
+  boot.kernelPackages = pkgs.linuxPackages_latest;
+
+  networking.hostName = "nixos-unstable"; # Define your hostname.
+
+  # Set your time zone.
+  time.timeZone = "Europe/Amsterdam";
+
+  # Select internationalisation properties.
+  # i18n.defaultLocale = "en_US.UTF-8";
+  # console = {
+  #   font = "Lat2-Terminus16";
+  #   keyMap = "us";
+  #   useXkbConfig = true; # use xkb.options in tty.
+  # };
+
+  # Define a user account. Don't forget to set a password with ‘passwd’.
+  users.mutableUsers = false;
+  users.users.root.hashedPassword = "$y$j9T$i4Yx7PqpLH9bPaNb4SVLm/$dv2gVHCHiRZv.Y00rbNx4QeIExunnfHp57WEnh8qLF1";
+  users.users.alice = {
+    isNormalUser = true;
+    hashedPassword = "";
+    extraGroups = [ "wheel" ]; # Enable ‘sudo’ for the user.
+    packages = with pkgs; [
+      tree
+    ];
+  };
+
+  environment.systemPackages = with pkgs; [
+  ];
+
+  # Open ports in the firewall.
+  # networking.firewall.allowedTCPPorts = [ ... ];
+  # networking.firewall.allowedUDPPorts = [ ... ];
+  # Or disable the firewall altogether.
+  # networking.firewall.enable = false;
+
+  system.stateVersion = "25.05"; # Did you read the comment?
+
+}

hosts/nixos-unstable/default.nix

@@ -0,0 +1,7 @@
+{ inputs, pkgs, ...}: {
+  imports = [
+    ./hardware-configuration.nix
+    ./configuration.nix
+    ../../profiles/base
+  ];
+}

hosts/nixos-unstable/hardware-configuration.nix

@@ -0,0 +1,35 @@
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/profiles/qemu-guest.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "ahci" "xhci_pci" "virtio_pci" "sr_mod" "virtio_blk" ];
+  boot.initrd.kernelModules = [ ];
+  boot.initrd.systemd.enable = true;
+  boot.kernelModules = [ "kvm-amd" ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-uuid/d696e6e0-64f1-4cb5-9ac6-57a3fd4634cc";
+      fsType = "btrfs";
+    };
+
+  fileSystems."/boot" =
+    { device = "/dev/disk/by-uuid/FA31-9186";
+      fsType = "vfat";
+      options = [ "fmask=0022" "dmask=0022" ];
+    };
+
+  swapDevices = [ ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.enp1s0.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+}

profiles/base/default.nix

@@ -1,10 +1,7 @@
 { inputs, pkgs, ...}: {
-  nixpkgs.overlays = [
-    (import ../../pkgs)
-  ];
   nixpkgs.config.allowUnfree = true;
+  nixpkgs.flake.setFlakeRegistry = true;
   nix.settings.trusted-users = [ "root" "@wheel" ];
-  nix.registry.nixpkgs.flake = inputs.nixpkgs;
   nix.extraOptions = ''
     experimental-features = nix-command flakes
   '';
@@ -23,8 +20,7 @@
     };
   };
   environment.shellAliases = {
-    "nixos-switch" = "sudo nixos-rebuild switch --impure --flake .#";
+    "lah" = "ls --color=auto -lah";
-    "nom-affogato" = "nom build .#nixosConfigurations.affogato.config.system.build.toplevel --impure";
   };
   environment.variables = {
     EDITOR = "vim";
@@ -41,9 +37,9 @@
     bind.dnsutils
     openssl
     curl
+    wget
     htop
-    pinentry
+    usbutils
-    gnupg
+    pciutils
-    sequoia
   ];
 }

users/transcaffeine/default.nix

@@ -1,4 +1,8 @@
 { pkgs, ... }: {
+  environment.shellAliases = {
+    "nixos-switch" = "sudo nixos-rebuild switch --impure --flake .#";
+    "nom-affogato" = "nom build .#nixosConfigurations.affogato.config.system.build.toplevel --impure";
+  };
   users.users.transcaffeine = {
     isNormalUser = true;
     extraGroups = [ "wheel" ];
@@ -6,6 +10,9 @@
       "ssh-rsa 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 transcaffeine-openpgp:0x353A3E5B"
     ];
     packages = with pkgs; [
+      pinentry
+      gnupg
+      sequoia
       pass
       spotify
       gimp-with-plugins