python.pkgs.zeroconf: move to separate expression

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

@@ -0,0 +1,22 @@
+{ stdenv, buildPythonPackage, fetchPypi
+, netifaces, six, enum-compat }:
+
+buildPythonPackage rec {
+  pname = "zeroconf";
+  version = "0.18.0";
+  name = "${pname}-${version}";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0s1840v2h4h19ad8lfadbm3dhzs8bw9c5c3slkxql1zsaiycvjy2";
+  };
+
+  propagatedBuildInputs = [ netifaces six enum-compat ];
+
+  meta = with stdenv.lib; {
+    description = "A pure python implementation of multicast DNS service discovery";
+    homepage = "https://github.com/jstasiak/python-zeroconf";
+    license = licenses.lgpl21;
+    maintainers = with maintainers; [ abbradar ];
+  };
+}