pythonPackages.deform: move expression

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

@@ -0,0 +1,31 @@
+{ lib, buildPythonPackage, fetchPypi
+, beautifulsoup4, peppercorn, colander, translationstring
+, chameleon, zope_deprecation, coverage, nose }:
+
+buildPythonPackage rec {
+  pname = "deform";
+  version = "2.0a2";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "3fa4d287c8da77a83556e4a5686de006ddd69da359272120b915dc8f5a70cabd";
+  };
+
+  propagatedBuildInputs = [
+    beautifulsoup4
+    peppercorn
+    colander
+    translationstring
+    chameleon
+    zope_deprecation
+    coverage
+    nose
+  ];
+
+  meta = with lib; {
+    description = "Form library with advanced features like nested forms";
+    homepage = https://docs.pylonsproject.org/projects/deform/en/latest/;
+    license = licenses.free; # http://www.repoze.org/LICENSE.txt
+    maintainers = with maintainers; [ garbas domenkozar ];
+  };
+}

pkgs/top-level/python-packages.nix

@@ -3651,32 +3651,7 @@ in {
 
   decorator = callPackage ../development/python-modules/decorator { };
 
-  deform = buildPythonPackage rec {
+  deform = callPackage ../development/python-modules/deform { };
-    name = "deform-2.0a2";
-
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/d/deform/${name}.tar.gz";
-      sha256 = "3fa4d287c8da77a83556e4a5686de006ddd69da359272120b915dc8f5a70cabd";
-    };
-
-    buildInputs = with self; [] ++ optional isPy26 unittest2;
-
-    propagatedBuildInputs =
-      [ self.beautifulsoup4
-        self.peppercorn
-        self.colander
-        self.translationstring
-        self.chameleon
-        self.zope_deprecation
-        self.coverage
-        self.nose
-      ];
-
-    meta = {
-      maintainers = with maintainers; [ garbas domenkozar ];
-      platforms = platforms.all;
-    };
-  };
 
   demjson = callPackage ../development/python-modules/demjson { };