https://raw.githubusercontent.com/omniosorg/omnios-build/master/build/python37/patches/regrtest-processgroup.patch

Running some sub-tests in process groups causes tests to hang - the reason it
not yet known.
Disable the use of process groups for now.

--- Python-3.12.1/Lib/test/libregrtest/worker.py.orig
+++ Python-3.12.1/Lib/test/libregrtest/worker.py
@@ -14,8 +14,8 @@
     get_temp_dir, get_work_dir, exit_timeout)
 
 
-USE_PROCESS_GROUP = (hasattr(os, "setsid") and hasattr(os, "killpg"))
-
+USE_PROCESS_GROUP = (hasattr(os, "setsid") and hasattr(os, "killpg")
+                     and not sys.platform.startswith("sunos"))
 
 def create_worker_process(runtests: WorkerRunTests, output_fd: int,
                           tmp_dir: StrPath | None = None) -> subprocess.Popen: