[[machinename.nix]]
{pkgs, lib, ...}:
with lib;

{
  imports = [ ./home.nix];
  options = {
      host = mkOption {
           hostname = mkOption {
               type  = types.string;
               default = "";
               description = ''
               Hostname used to differ between configurations of different machienes
               '';
           };
       };
  };
  host.hostname = "machinename";
}


[[home.nix]]
{ config, pkgs, ... }:
with import <nixpkgs> {};
with builtins;
with lib;
with import <home-manager/modules/lib/dag.nix> { inherit lib; };
{
  home.packages = if host.hostname == "machinename" then [ htop] else [];
}

[[command to build homemanager configuration]]
home-manager -f ~/experimentdir/machinename.nix switch