python.pkgs.virtkey: move to a separate file

pkgs/development/python-modules/virtkey/default.nix

@@ -0,0 +1,23 @@
+{ lib, buildPythonPackage, fetchurl, pkgconfig, gtk2, libX11, libXtst, libXi, libxkbfile, xextproto, xproto }:
+
+buildPythonPackage rec {
+  name = "virtkey-${version}";
+  majorVersion = "0.63";
+  version = "${majorVersion}.0";
+
+  src = fetchurl {
+    url = "https://launchpad.net/virtkey/${majorVersion}/${version}/+download/virtkey-${version}.tar.gz";
+    sha256 = "0hd99hrxn6bh3rxcrdnad5cqjsphrn1s6fzx91q07d44k6cg6qcr";
+  };
+
+  nativeBuildInputs = [ pkgconfig ];
+
+  buildInputs = [ gtk2 libX11 libXtst libXi libxkbfile xextproto xproto ];
+
+  meta = with lib; {
+    description = "Extension to emulate keypresses and to get the layout information from the X server";
+    homepage = https://launchpad.net/virtkey;
+    license = licenses.gpl3;
+    maintainers = with maintainers; [ abbradar ];
+  };
+}

pkgs/top-level/python-packages.nix

@@ -17560,31 +17560,7 @@ in {
     };
   };
 
-  virtkey = buildPythonPackage rec {
+  virtkey = callPackage ../development/python-modules/virtkey { };
-    name = "virtkey-${version}";
-    majorVersion = "0.63";
-    version = "${majorVersion}.0";
-
-    src = pkgs.fetchurl {
-      url = "https://launchpad.net/virtkey/${majorVersion}/${version}/+download/virtkey-${version}.tar.gz";
-      sha256 = "0hd99hrxn6bh3rxcrdnad5cqjsphrn1s6fzx91q07d44k6cg6qcr";
-    };
-
-    nativeBuildInputs = [ pkgs.pkgconfig ];
-
-    buildInputs =
-         [ pkgs.gtk2 ]
-      ++ (with pkgs.xorg; [ libX11 libXtst libXi libxkbfile xextproto xproto ]);
-
-    meta = {
-      description = "Extension to emulate keypresses and to get the layout information from the X server";
-      homepage = "https://launchpad.net/virtkey";
-      license = licenses.gpl3;
-      maintainers = with maintainers; [ abbradar ];
-    };
-  };
-
-
 
   virtual-display = buildPythonPackage rec {
     name = "PyVirtualDisplay-0.1.5";