python.pkgs: many updates

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

@@ -1,6 +1,8 @@
-{ stdenv, buildPythonPackage, fetchurl, isPy26, argparse, hypothesis, py }:
+{ stdenv, buildPythonPackage, fetchurl, isPy26, argparse, hypothesis, py
+, setuptools_scm
+}:
 buildPythonPackage rec {
-  version = "3.0.7";
+  version = "3.2.1";
   pname = "pytest";
   name = "${pname}-${version}";
 
@@ -11,10 +13,10 @@ buildPythonPackage rec {
 
   src = fetchurl {
     url = "mirror://pypi/p/pytest/${name}.tar.gz";
-    sha256 = "b70696ebd1a5e6b627e7e3ac1365a4bc60aaf3495e843c1e70448966c5224cab";
+    sha256 = "4c2159d2be2b4e13fa293e7a72bdf2f06848a017150d5c6d35112ce51cfd74ce";
   };
 
-  buildInputs = [ hypothesis ];
+  buildInputs = [ hypothesis setuptools_scm ];
   propagatedBuildInputs = [ py ]
     ++ (stdenv.lib.optional isPy26 argparse);