diff --git a/pkgs/development/python-modules/purl/default.nix b/pkgs/development/python-modules/purl/default.nix
index 43fd5b71ca6..aa85ea3965a 100644
--- a/pkgs/development/python-modules/purl/default.nix
+++ b/pkgs/development/python-modules/purl/default.nix
@@ -1,22 +1,19 @@
 { lib, buildPythonPackage, fetchFromGitHub
-, nose
-, six
+, pytestCheckHook
 }:
 
 buildPythonPackage rec {
   pname = "purl";
-  version = "1.5";
+  version = "1.6";
 
   src = fetchFromGitHub {
     owner = "codeinthehole";
     repo = "purl";
     rev = version;
-    sha256 = "0vi7xdm2xc1rbqrz5jwpr7x7dnkcrbjf1mb4w1q2c2f8jca0kk0g";
+    sha256 = "sha256-Jb3JRW/PtQ7NlO4eQ9DmTPu/sjvFTg2mztphoIF79gc=";
   };
 
-  propagatedBuildInputs = [ six ];
-
-  checkInputs = [ nose ];
+  checkInputs = [ pytestCheckHook];
 
   meta = with lib; {
     description = "Immutable URL class for easy URL-building and manipulation";