pythonPackages.zict: Move to own file

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

@@ -0,0 +1,22 @@
+{ stdenv, buildPythonPackage, fetchPypi
+, pytest, heapdict }:
+
+buildPythonPackage rec {
+  pname = "zict";
+  version = "0.1.1";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "12h95vbkbar1hc6cr1kpr6zr486grj3mpx4lznvmnai0iy6pbqp4";
+  };
+
+  buildInputs = [ pytest ];
+  propagatedBuildInputs = [ heapdict ];
+
+  meta = with stdenv.lib; {
+    description = "Mutable mapping tools.";
+    homepage = https://github.com/dask/zict;
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ teh ];
+  };
+}

pkgs/top-level/python-packages.nix

@@ -2007,26 +2007,7 @@ in {
 
   heapdict = callPackage ../development/python-modules/heapdict { };
 
-  zict = buildPythonPackage rec {
+  zict = callPackage ../development/python-modules/zict { };
-
-    name = "zict-${version}";
-    version = "0.1.1";
-
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/z/zict/${name}.tar.gz";
-      sha256 = "12h95vbkbar1hc6cr1kpr6zr486grj3mpx4lznvmnai0iy6pbqp4";
-    };
-
-    buildInputs = with self; [ pytest ];
-    propagatedBuildInputs = with self; [ heapdict ];
-
-    meta = {
-      description = "Mutable mapping tools.";
-      homepage = https://github.com/dask/zict;
-      license = licenses.bsd3;
-      maintainers = with maintainers; [ teh ];
-    };
-  };
 
   distributed = buildPythonPackage rec {