diff --git a/pkgs/development/python-modules/packaging/default.nix b/pkgs/development/python-modules/packaging/default.nix
index abe58d03ef3..061e8edaac6 100644
--- a/pkgs/development/python-modules/packaging/default.nix
+++ b/pkgs/development/python-modules/packaging/default.nix
@@ -1,18 +1,33 @@
-{ stdenv, buildPythonPackage, fetchPypi
-, pyparsing, six, pytest, pretend }:
+{ stdenv
+, buildPythonPackage
+, fetchPypi
+, pyparsing
+, six
+, pytestCheckHook
+, pretend
+, flit-core
+}:
 
 buildPythonPackage rec {
   pname = "packaging";
-  version = "20.4";
+  version = "20.7";
+  format = "pyproject";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "4357f74f47b9c12db93624a82154e9b120fa8293699949152b22065d556079f8";
+    sha256 = "Ba87uF0yA3fbKBzyVKsFDhp+vL9UEGhamkB+GKH4EjY=";
   };
 
+  nativeBuildInputs = [
+    flit-core
+  ];
+
   propagatedBuildInputs = [ pyparsing six ];
 
-  checkInputs = [ pytest pretend ];
+  checkInputs = [
+    pytestCheckHook
+    pretend
+  ];
 
   checkPhase = ''
     py.test tests