fixup the win10 desktop file

modules/virtualization/docker.nix

@@ -6,5 +6,5 @@
 }:
 mkOizysModule config "docker" {
   virtualisation.docker.enable = true;
-  environment.systemPackages = with pkgs; [ lazydocker];
+  environment.systemPackages = with pkgs; [ lazydocker ];
 }

modules/virtualization/virtualbox.nix

@@ -1,18 +1,30 @@
-{ config, mkOizysModule, pkgs,... }:
+{
+  config,
+  mkOizysModule,
+  pkgs,
+  ...
+}:
 let
-# TODO: polish this up
- win10vm = pkgs.stdenvNoCC.mkDerivation {
-  name = "win10vm";
-  unpackPhase = "true";
-  buildPhase = "mkdir $out";
-  version = "unstable";
-  desktopItem = pkgs.makeDesktopItem {
+
+  win10vm = pkgs.stdenvNoCC.mkDerivation rec {
     name = "win10vm";
-    exec = "VBoxManage startvm win10";
-    # icon = ""; # TODO: add windows icon
-    desktopName = "Windows 10 VM";
+    unpackPhase = "true";
+    version = "unstable";
+    windows10Logo = pkgs.fetchurl {
+      url = "https://upload.wikimedia.org/wikipedia/commons/c/c7/Windows_logo_-_2012.png";
+      hash = "sha256-uVNgGUo0NZN+mUmvMzyk0HKnhx64uqT4YWGSdeBz3T4=";
+    };
+
+    desktopItem = pkgs.makeDesktopItem {
+      name = "win10vm";
+      exec = "VBoxManage startvm win10";
+      icon = "${windows10Logo}";
+      desktopName = "Windows 10 VM";
+    };
+    installPhase = ''
+      install -Dm0644 {${desktopItem},$out}/share/applications/win10vm.desktop
+    '';
   };
-};
 in
 mkOizysModule config "vbox" {
   virtualisation.virtualbox = {