nix: Make nix the root

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

os/desktop.nix

@@ -0,0 +1,38 @@
+{ pkgs, lib, config, ... }:
+{
+  config = lib.mkIf config.frogeye.desktop.xorg {
+    # Enable the X11 windowing system
+
+    services.xserver = {
+      enable = true;
+      windowManager.i3.enable = true;
+      displayManager.defaultSession = "none+i3";
+
+      # Keyboard layout
+      extraLayouts.qwerty-fr = {
+        description = "QWERTY-fr";
+        languages = [ "fr" ];
+        symbolsFile = "${pkgs.stdenv.mkDerivation {
+          name = "qwerty-fr-keypad";
+          src = builtins.fetchGit {
+            url = "https://github.com/qwerty-fr/qwerty-fr.git";
+            rev = "3a4d13089e8ef016aa20baf6b2bf3ea53de674b8";
+          };
+          patches = [ ./qwerty-fr-keypad.diff ];
+          # TODO This doesn't seem to be applied... it's the whole point of the derivation :(
+          installPhase = ''
+            runHook preInstall
+            mkdir -p $out/linux
+            cp $src/linux/us_qwerty-fr $out/linux
+            runHook postInstall
+          '';
+      }}/linux/us_qwerty-fr";
+      };
+      layout = "qwerty-fr";
+    };
+
+    # Enable sound
+    sound.enable = true;
+    hardware.pulseaudio.enable = true;
+  };
+}