allow Home Manager to be used as a NixOS module

This is a NixOS module that is intended to be imported into a NixOS
system configuration. It allows the system users to be set up directly
from the system configuration.

The actual profile switch is performed by a oneshot systemd unit per
configured user that acts much like the regular `home-manager switch`
command.

With this implementation, the NixOS module does not work properly with
the `nixos-rebuild build-vm` command. This can be solved by using the
`users.users.<name?>.packages` option to install packages but this
does not work flawlessly with certain Nixpkgs packages. In particular,
for programs using the Qt libraries.

1 files changed, 2 insertions, 0 deletions

diff --git a/default.nix b/default.nix
index 2988bbbf0d8..9ae18232316 100644
--- a/default.nix
+++ b/default.nix
@@ -9,4 +9,6 @@ rec {
   install = import ./home-manager/install.nix {
     inherit home-manager pkgs;
   };
+
+  nixos = import ./nixos;
 }