diff --git a/ci-root.nix b/ci-root.nix
index d780ad8f17..d12dbae1cf 100644
--- a/ci-root.nix
+++ b/ci-root.nix
@@ -8,8 +8,9 @@ let
   lib = pkgs.lib;
   prefixAttrs = prefix: lib.mapAttrsToList (name: value: { name = "${prefix}-${name}"; path = value; });
   ciMachines = prefixAttrs "machine" depot.ops.nixos.systems;
-  ciPackages = prefixAttrs "pkg" (builtins.removeAttrs depot.nix.pkgs [ "grafana-plugins" ]);
+  ciPackages = prefixAttrs "pkg" (builtins.removeAttrs depot.nix.pkgs [ "grafana-plugins" "windows" ]);
   ciGrafanaPlugins = prefixAttrs "pkg-grafana-plugins" depot.nix.pkgs.grafana-plugins;
+  ciWindows = prefixAttrs "pkg-windows" depot.nix.pkgs.windows;
   ciDocker = prefixAttrs "docker" ((import ./docker-images.nix).images);
   ciWeb = prefixAttrs "web" depot.web;
 
@@ -19,4 +20,4 @@ let
     twitternuke = depot.go.twitternuke;
   };
 in
-pkgs.linkFarm "ci" (ciMachines ++ ciPackages ++ ciGrafanaPlugins ++ ciDocker ++ ciWeb ++ ciOther)
+pkgs.linkFarm "ci" (ciMachines ++ ciPackages ++ ciWindows ++ ciGrafanaPlugins ++ ciDocker ++ ciWeb ++ ciOther)
diff --git a/nix/pkgs/default.nix b/nix/pkgs/default.nix
index 4ba5bc7710..fc4266fd20 100644
--- a/nix/pkgs/default.nix
+++ b/nix/pkgs/default.nix
@@ -21,5 +21,6 @@
   tiny-remapper = import ./tiny-remapper.nix args;
   django-allauth = pkgs.python3Packages.callPackage ./django-allauth.nix {};
   django-tailwind = pkgs.python3Packages.callPackage ./django-tailwind.nix {};
+  windows = import ./windows args;
 } // (import ./heptapod-runner.nix args)
   // (import ./lightspeed args)
diff --git a/nix/pkgs/windows/default.nix b/nix/pkgs/windows/default.nix
new file mode 100644
index 0000000000..f9d940f6de
--- /dev/null
+++ b/nix/pkgs/windows/default.nix
@@ -0,0 +1,14 @@
+{ pkgs, ... }:
+
+rec {
+  serverISO = pkgs.requireFile {
+    name = "en_windows_server_2019_updated_jan_2021_x64_dvd_5ef22372.iso";
+    url = "https://my.visualstudio.com/Downloads";
+    sha256 = "9976B3E125050542CA50DE3C7347D132113834EDC151C64C55F9E30BC4D2160F";
+  };
+  clientISO = pkgs.requireFile {
+    name = "en_windows_10_consumer_editions_version_20h2_updated_jan_2021_x64_dvd_00152b46.iso";
+    url = "https://my.visualstudio.com/Downloads";
+    sha256 = "18C05A70676F9AA8C7CE9A90BB63F6105CCDD630538DA03D24547089E7DA19D2";
+  };
+}