pythonPackages.pdfx: 1.3.1 -> 1.4.1

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

···
-{ lib, buildPythonPackage, fetchFromGitHub, pdfminer, chardet, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, pdfminer, chardet, pytestCheckHook }:
 
 buildPythonPackage rec {
   pname = "pdfx";
-  version = "1.3.1";
+  version = "1.4.1";
 
   src = fetchFromGitHub {
     owner = "metachris";
     repo = "pdfx";
     rev = "v${version}";
-    sha256 = "1183k4h5qdf8y0imbir9ja3yzzsvdmqgbv3bi6dnkgr1wy2xfr0v";
+    sha256 = "sha256-POpP6XwcqwvImrtIiDjpnHoNE0MKapuPjxojo+ocBK0=";
   };
 
-  # Remove after https://github.com/metachris/pdfx/pull/28
-  prePatch = ''
-    sed -i -e "s|pdfminer2|pdfminer.six|" setup.py
+  postPatch = ''
+    substituteInPlace requirements.txt \
+      --replace "chardet==4.0.0" "chardet"
   '';
 
   propagatedBuildInputs = [ pdfminer chardet ];
 
-  checkInputs = [ pytest ];
-
-  checkPhase = ''
-    py.test
-  '';
+  checkInputs = [ pytestCheckHook ];
 
   meta = with lib; {
     inherit (src.meta) homepage;