add a minimal module for VMs

systems/minimal/default.nix

@@ -0,0 +1,9 @@
+{ ... }:
+{
+  # Inspired by
+  # https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/profiles/minimal.nix
+  environment.noXlibs = true;
+  documentation.enable = false;
+  documentation.nixos.enable = false;
+  programs.command-not-found.enable = false;
+}

systems/proxmox-vm/default.nix

@@ -2,6 +2,7 @@
 {
   imports = [
     (import "${self}/modules/mk-network" { inherit hostname ip; })
+    (import "${self}/systems/minimal")
   ];
   boot.initrd.availableKernelModules = [
     "ata_piix"