python3Packages.google-cloud-bigquery: patch for arrow 8 and parallelize tests

pkgs/development/python-modules/google-cloud-bigquery/default.nix

@@ -16,6 +16,7 @@
 , proto-plus
 , psutil
 , pyarrow
+, pytest-xdist
 }:
 
 buildPythonPackage rec {
@@ -28,6 +29,11 @@ buildPythonPackage rec {
     sha256 = "sha256-UmW6BEV44Ucdg/hUGSQk/kyDnB+Hsyx4q3AXTQe89hI=";
   };
 
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace 'pyarrow >= 3.0.0, < 8.0dev' 'pyarrow >= 3.0.0, < 9.0dev'
+  '';
+
   propagatedBuildInputs = [
     google-cloud-core
     google-cloud-bigquery-storage
@@ -47,6 +53,7 @@ buildPythonPackage rec {
     google-cloud-datacatalog
     google-cloud-storage
     pytestCheckHook
+    pytest-xdist
   ];
 
   # prevent google directory from shadowing google imports