diff --git a/pkgs/development/python-modules/pyro4/default.nix b/pkgs/development/python-modules/pyro4/default.nix
index 70aaaa7b4cfb..8d783c7ef0a7 100644
--- a/pkgs/development/python-modules/pyro4/default.nix
+++ b/pkgs/development/python-modules/pyro4/default.nix
@@ -37,7 +37,9 @@ buildPythonPackage rec {
   ];
 
   # add testsupport.py to PATH
-  preCheck = "PYTHONPATH=tests/PyroTests:$PYTHONPATH";
+  preCheck = ''
+    PYTHONPATH=tests/PyroTests:$PYTHONPATH
+  '';
 
 
   pytestFlagsArray = [
@@ -61,6 +63,7 @@ buildPythonPackage rec {
   meta = with lib; {
     description = "Distributed object middleware for Python (RPC)";
     homepage = "https://github.com/irmen/Pyro4";
+    changelog = "https://github.com/irmen/Pyro4/releases/tag/{version}";
     license = licenses.mit;
     maintainers = with maintainers; [ prusnak ];
   };