nix: Make nix the root

Which means now I'll have to think about real prefixes in commit names.

os/geoffrey.nix

@@ -0,0 +1,36 @@
+{ pkgs, config, ... }:
+{
+  imports = [
+    <home-manager/nixos>
+  ];
+
+  users.users.geoffrey = {
+    isNormalUser = true;
+    extraGroups = [ "wheel" ]; # Enable ‘sudo’ for the user.
+    shell = pkgs.zsh;
+
+    openssh.authorizedKeys.keys = [
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPE41gxrO8oZ5n3saapSwZDViOQphm6RzqgsBUyA88pU geoffrey@frogeye.fr"
+    ];
+  };
+
+  # Won't allow to set the shell otherwise,
+  # even though home-manager sets it
+  programs.zsh.enable = true;
+
+  home-manager = {
+    users.geoffrey = { pkgs, ... }: {
+      imports = [
+        ../hm/loader.nix
+      ];
+      frogeye = config.frogeye;
+    };
+    # Makes VMs able to re-run
+    useUserPackages = true;
+    # Adds consistency
+    useGlobalPkgs = true;
+  };
+
+  # FIXME Make sure I'm the only user & everything is encrypted
+  services.xserver.displayManager.autoLogin.user = "geoffrey";
+}