virt only on North

home-modules/virt-manager.nix

@@ -1,14 +1,16 @@
-{ config, pkgs, ... }:
+{ config, pkgs, host, ... }:
 {
-  home.packages = with pkgs; [
-    virt-manager
-  ];
+  config = pkgs.lib.mkIf (host == "NxNORTH") { 
+    home.packages = with pkgs; [
+      virt-manager
+    ];
 
-  # programs.virt-manager.enable = true; # needs this in virtualization.nix
-  dconf.settings = {
-    "org/virt-manager/virt-manager/connections" = {
-      autoconnect = [ "qemu:///system" ];
-      uris = [ "qemu:///system" ];
+    # programs.virt-manager.enable = true; # needs this in virtualization.nix
+    dconf.settings = {
+      "org/virt-manager/virt-manager/connections" = {
+        autoconnect = [ "qemu:///system" ];
+        uris = [ "qemu:///system" ];
+      };
     };
   };
-}
+}

system-modules/virtualisation.nix

@@ -1,10 +1,12 @@
-{ config, pkgs, user, ... }:
+{ config, pkgs, lib, user, host, ... }:
 
 {
-  environment.systemPackages = with pkgs; [
-     virtiofsd
-  ];
-  virtualisation.libvirtd.enable = true;
-  programs.virt-manager.enable = true;
-  users.users."${user}".extraGroups = [ "libvirtd" ];
+  config = lib.mkIf (host == "NxNORTH") {
+    environment.systemPackages = with pkgs; [
+      virtiofsd
+    ];
+    virtualisation.libvirtd.enable = true;
+    programs.virt-manager.enable = true;
+    users.users."${user}".extraGroups = [ "libvirtd" ];
+  };
 }