python.pkgs.alabaster : move to separate expression

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

@@ -0,0 +1,24 @@
+{ stdenv, buildPythonPackage, fetchPypi
+, pygments }:
+
+buildPythonPackage rec {
+  pname = "alabaster";
+  version = "0.7.7";
+  name = "${pname}-${version}";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "f416a84e0d0ddbc288f6b8f2c276d10b40ca1238562cd9ed5a751292ec647b71";
+  };
+
+  propagatedBuildInputs = [ pygments ];
+
+  # No tests included
+  doCheck = false;
+
+  meta = with stdenv.lib; {
+    homepage = https://github.com/bitprophet/alabaster;
+    description = "A Sphinx theme";
+    license = licenses.bsd3;
+  };
+}

pkgs/top-level/python-packages.nix

@@ -305,26 +305,7 @@ in {
     };
   };
 
-  alabaster = buildPythonPackage rec {
-    name = "alabaster-0.7.7";
-
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/a/alabaster/${name}.tar.gz";
-      sha256 = "f416a84e0d0ddbc288f6b8f2c276d10b40ca1238562cd9ed5a751292ec647b71";
-    };
-
-    propagatedBuildInputs = with self; [ pygments ];
-
-    # No tests included
-    doCheck = false;
-
-    meta = {
-      homepage = https://github.com/bitprophet/alabaster;
-      description = "A Sphinx theme";
-      license = licenses.bsd3;
-    };
-  };
-
+  alabaster = callPackage ../development/python-modules/alabaster {};
 
   alembic = callPackage ../development/python-modules/alembic {};