diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index f8f5d00a0696..353fa9eec829 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -18966,18 +18966,19 @@ in {
     };
   };
 
-
   pytz = buildPythonPackage rec {
-    name = "pytz-${version}";
-    version = "2016.6.1";
+    name = "${pname}-${version}";
+    pname = "pytz";
+    version = "2017.2";
 
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/p/pytz/${name}.tar.gz";
-      sha256 = "6f57732f0f8849817e9853eb9d50d85d1ebb1404f702dbc44ee627c642a486ca";
+    src = fetchPypi {
+      inherit pname version;
+      sha256 = "12cmd3j46d2gcw08bspvp6s9icfcvx88zjz52n1bli9dyvl5dh7m";
+      extension = "zip";
     };
 
     checkPhase = ''
-      ${python.interpreter} -m unittest discover -s pytz/tests
+      python -m unittest discover -s pytz/tests
     '';
 
     meta = {
@@ -18987,7 +18988,6 @@ in {
     };
   };
 
-
   pyutil = buildPythonPackage (rec {
     name = "pyutil-2.0.0";