pylibmc: init at 1.5.1; patch by @risicle

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

···
+{ buildPythonPackage, fetchurl, stdenv, libmemcached, zlib }:
+buildPythonPackage rec {
+  name = "pylibmc-${version}";
+  version = "1.5.1";
+
+  src = fetchurl {
+    url = "https://pypi.python.org/packages/source/p/pylibmc/${name}.tar.gz";
+    sha256 = "1mnd8lng9wmcihl7mxd940hy1dzzvzsb971qclrvmqf3b4c2dfpc";
+  };
+
+  buildInputs = [ libmemcached zlib ];
+
+  # requires an external memcached server running
+  doCheck = false;
+
+  meta = with stdenv.lib; {
+    description = "Quick and small memcached client for Python";
+    homepage = http://sendapatch.se/projects/pylibmc/;
+    license = licenses.bsd3;
+  };
+}

pkgs/top-level/python-packages.nix

···
     };
   };
 
+  pylibmc = callPackage ../development/python-modules/pylibmc {};
+
   pymetar = buildPythonPackage rec {
     name = "${pname}-${version}";
     pname = "pymetar";