Added sithlainnir

hosts/sithlainnir.nix

@@ -0,0 +1,38 @@
+# Configuration for sithlainnir, a Lenovo x201
+
+{ config, pkgs, ... }:
+
+{
+  imports =
+    [
+      ../hardware/lenovo_x201.nix
+      ../roles/desktop_common.nix
+    ];
+
+  # Use the GRUB 2 boot loader.
+  boot.loader.grub.enable = true;
+  boot.loader.grub.version = 2;
+  boot.loader.grub.device = "/dev/sda";
+
+  deployment.targetHost = "10.69.0.146";
+  networking.hostName = "sithlainnir";   # Define your hostname.
+
+  # Adapted from gchristensen
+  nix.nixPath = [
+    # Ruin the config so we don't accidentally run
+    # nixos-rebuild switch on the host
+    (let
+      cfg = pkgs.writeText "configuration.nix"
+        ''
+          assert builtins.trace "This system is managed by NixOps." false;
+          {}
+        '';
+    in "nixos-config=${cfg}")
+
+    # Copy the channel version from the deploy host to the target
+    "nixpkgs=/run/current-system/nixpkgs"
+  ];
+
+  system.stateVersion = "18.09";   # The version of NixOS originally installed
+
+}