python.pkgs.boto3: move expression

pkgs/development/python-modules/boto3/default.nix

···
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, botocore
+, jmespath
+, s3transfer
+, futures
+, docutils
+, nose
+, mock
+, isPy3k
+}:
+
+buildPythonPackage rec {
+  pname =  "boto3";
+  version = "1.4.8";
+
+  src = fetchFromGitHub {
+    owner = "boto";
+    repo  = "boto3";
+    rev   = version;
+    sha256 = "11ysd7a9l5y98q7b7az56phsj2m7w90abf4jabwrknp2c43sq9bi";
+  };
+
+  propagatedBuildInputs = [ botocore jmespath s3transfer ] ++ lib.optionals (!isPy3k) [ futures ];
+  checkInputs = [ docutils nose mock ];
+
+  checkPhase = ''
+    runHook preCheck
+    # This method is not in mock. It might have appeared in some versions.
+    sed -i 's/action.assert_called_once()/self.assertEqual(action.call_count, 1)/' \
+      tests/unit/resources/test_factory.py
+    nosetests -d tests/unit --verbose
+    runHook postCheck
+  '';
+
+  # Network access
+  doCheck = false;
+
+  meta = {
+    homepage = https://github.com/boto/boto3;
+    license = lib.licenses.asl20;
+    description = "AWS SDK for Python";
+    longDescription = ''
+      Boto3 is the Amazon Web Services (AWS) Software Development Kit (SDK) for
+      Python, which allows Python developers to write software that makes use of
+      services like Amazon S3 and Amazon EC2.
+    '';
+  };
+}

pkgs/top-level/python-packages.nix

···
     };
   };
 
-  boto3 = buildPythonPackage rec {
-    name = "boto3-${version}";
-    version = "1.4.8";
-
-    src = pkgs.fetchFromGitHub {
-      owner = "boto";
-      repo  = "boto3";
-      rev   = version;
-      sha256 = "11ysd7a9l5y98q7b7az56phsj2m7w90abf4jabwrknp2c43sq9bi";
-    };
-
-    propagatedBuildInputs = [ self.botocore self.jmespath self.s3transfer ] ++
-                            (if isPy3k then [] else [self.futures]);
-    buildInputs = [ self.docutils self.nose self.mock ];
-    checkPhase = ''
-      runHook preCheck
-      # This method is not in mock. It might have appeared in some versions.
-      sed -i 's/action.assert_called_once()/self.assertEqual(action.call_count, 1)/' \
-        tests/unit/resources/test_factory.py
-      nosetests -d tests/unit --verbose
-      runHook postCheck
-    '';
-
-    # Network access
-    doCheck = false;
-
-    meta = {
-      homepage = https://github.com/boto/boto3;
-      license = stdenv.lib.licenses.asl20;
-      description = "AWS SDK for Python";
-      longDescription = ''
-        Boto3 is the Amazon Web Services (AWS) Software Development Kit (SDK) for
-        Python, which allows Python developers to write software that makes use of
-        services like Amazon S3 and Amazon EC2.
-      '';
-    };
-  };
+  boto3 = callPackage ../development/python-modules/boto3 { };
 
   botocore = callPackage ../development/python-modules/botocore { };