make vm architecture agnostic

flake.nix

@@ -73,6 +73,10 @@
     apple-silicon,
     ...
   }: let
+    # All systems we want to support for the generic VM
+    supportedSystems = ["x86_64-linux" "aarch64-linux"];
+    # to run the vm:
+    # nixos-rebuild build-vm --flake ~/nix#$(nix eval --raw --impure --expr 'builtins.currentSystem')
     mkNixosSystem = {
       hostname,
       system,
@@ -83,7 +87,7 @@
         inherit system;
         specialArgs =
           {
-            inherit catppuccin;
+            inherit catppuccin system;
           }
           // extraSpecialArgs;
         modules =
@@ -144,8 +148,10 @@
           nixvim.homeModules.nixvim
         ];
       };
-  in {
-    nixosConfigurations = {
+  in
+    {
+      nixosConfigurations =
+        {
           peach = mkNixosSystem {
             hostname = "peach";
             system = "aarch64-linux";
@@ -162,12 +168,14 @@
               inherit nix-cachyos-kernel;
             };
           };
-
-      vm-aarch64 = mkNixosSystem {
-        hostname = "vm-aarch64";
-        system = "aarch64-linux";
-      };
-    };
+        }
+        // nixpkgs.lib.genAttrs supportedSystems (
+          system:
+            mkNixosSystem {
+              hostname = "vm-generic";
+              inherit system;
+            }
+        );
 
       homeConfigurations = {
         peach = mkHomeConfig {
@@ -180,11 +188,14 @@
           hostname = "alien";
           system = "x86_64-linux";
         };
-      vm-aarch64 = mkHomeConfig {
+      };
+    }
+    // nixpkgs.lib.genAttrs supportedSystems (
+      system:
+        mkHomeConfig {
           user = "sckova";
-        hostname = "vm-aarch64";
-        system = "aarch64-linux";
-      };
-    };
-  };
+          hostname = "vm-generic";
+          inherit system;
+        }
+    );
 }

hardware/vm-generic/default.nix

@@ -2,10 +2,9 @@
 # and may be overwritten by future invocations.  Please make changes
 # to /etc/nixos/configuration.nix instead.
 {
-  config,
   lib,
   pkgs,
-  modulesPath,
+  system,
   ...
 }: {
   imports = [];
@@ -30,7 +29,12 @@
     {device = "/dev/disk/by-label/swap";}
   ];
 
-  nixpkgs.hostPlatform = lib.mkDefault "aarch64-linux";
-  hardware.parallels.enable = true;
-  nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) ["prl-tools"];
+  # Set platform from the system argument passed by the flake
+  nixpkgs.hostPlatform = lib.mkDefault system;
+
+  # Enable Parallels tools only on aarch64
+  hardware.parallels.enable = lib.mkIf (system == "aarch64-linux") true;
+  nixpkgs.config.allowUnfreePredicate =
+    lib.mkIf (system == "aarch64-linux")
+    (pkg: builtins.elem (lib.getName pkg) ["prl-tools"]);
 }

home/default.nix

@@ -235,13 +235,13 @@
         then "dark"
         else "light";
 
-      theme = {
-        package = pkgs.kdePackages.breeze-gtk;
-        name =
-          if config.userOptions.isDark
-          then "Breeze-Dark"
-          else "Breeze";
-      };
+      # theme = {
+      #   package = pkgs.kdePackages.breeze-gtk;
+      #   name =
+      #     if config.userOptions.isDark
+      #     then "Breeze-Dark"
+      #     else "Breeze";
+      # };
 
       iconTheme = {
         name =

system/hosts/alien/default.nix

@@ -1,8 +1,6 @@
 {
   config,
   pkgs,
-  lib,
-  inputs,
   catppuccin,
   nix-cachyos-kernel,
   ...
@@ -10,8 +8,9 @@
   networking.hostName = "alien";
 
   environment.systemPackages = with pkgs; [
-    pkgs.ddcutil
-    pkgs.mangohud
+    ddcutil
+    mangohud
+    (bottles.override {removeWarningPopup = true;})
   ];
 
   # enable ddcutil

system/hosts/vm-aarch64/default.nix

@@ -1,31 +0,0 @@
-{
-  config,
-  pkgs,
-  lib,
-  catppuccin,
-  ...
-}: {
-  networking.hostName = "vm-aarch64";
-
-  boot.binfmt.emulatedSystems = [
-    "x86_64-linux"
-    "riscv64-linux"
-  ];
-
-  catppuccin.accent = "green";
-
-  home-manager.users.sckova = {
-    imports = [catppuccin.homeModules.catppuccin];
-  };
-
-  services.spice-vdagentd.enable = true;
-
-  virtualisation.vmVariant = {
-    virtualisation = {
-      memorySize = 8192;
-      cores = 6;
-    };
-  };
-
-  security.sudo.wheelNeedsPassword = false;
-}

system/hosts/vm-generic/default.nix

@@ -0,0 +1,32 @@
+{
+  config,
+  pkgs,
+  lib,
+  catppuccin,
+  ...
+}: {
+  networking.hostName = "vm";
+
+  # Enable emulation for architectures we're not currently running
+  boot.binfmt.emulatedSystems =
+    lib.optional (pkgs.stdenv.hostPlatform.system != "x86_64-linux") "x86_64-linux"
+    ++ lib.optional (pkgs.stdenv.hostPlatform.system != "aarch64-linux") "aarch64-linux"
+    ++ lib.optional (pkgs.stdenv.hostPlatform.system != "riscv64-linux") "riscv64-linux";
+
+  catppuccin.accent = "green";
+
+  home-manager.users.sckova = {
+    imports = [catppuccin.homeModules.catppuccin];
+  };
+
+  services.spice-vdagentd.enable = true;
+
+  virtualisation.vmVariant = {
+    virtualisation = {
+      memorySize = 8192;
+      cores = 6;
+    };
+  };
+
+  security.sudo.wheelNeedsPassword = false;
+}