Ubuntu18.04で問題なくビルド・devtoolの使用ができていたワークスペースに関して、
Ubuntu20.04にアップデートしたところ、devtool modify systemdにて下記エラーを出力するようになりました。
ビルドは問題なく可能です。

ビルド対象はOpenSTLinux,展開しようとしたレシピはsystemdです
解決策をご存知でしたらご教示いただけますでしょうか。

ERROR: Error executing a python function in exec_python_func() autogenerated:

The stack trace of python calls that resulted in this exception/failure was:
File: 'exec_python_func() autogenerated', lineno: 2, function: <module>
0001:
*** 0002:devtool_post_unpack(d)
0003:
File: '/(省略)/layers/openembedded-core/meta/classes/devtool-source.bbclass', lineno: 68, function: devtool_post_unpack
0064:}
0065:
0066:
0067:python devtool_post_unpack() {
*** 0068: import oe.recipeutils
0069: import shutil
0070: sys.path.insert(0, os.path.join(d.getVar('COREBASE'), 'scripts', 'lib'))
0071: import scriptutils
0072: from devtool import setup_git_repo
File: '/home/makita/Doc/(省略)/layers/openembedded-core/meta/lib/oe/recipeutils.py', lineno: 21, function: <module>
0017:import shutil
0018:import re
0019:import fnmatch
0020:import glob
*** 0021:import bb.tinfoil
0022:
0023:from collections import OrderedDict, defaultdict
0024:from bb.utils import vercmp_string
0025:
File: '/(省略)/layers/openembedded-core/bitbake/lib/bb/tinfoil.py', lineno: 19, function: <module>
0015:from collections import OrderedDict, defaultdict
0016:from functools import partial
0017:
0018:import bb.cache
*** 0019:import bb.cooker
0020:import bb.providers
0021:import bb.taskdata
0022:import bb.utils
0023:import bb.command
File: '/(省略)/layers/openembedded-core/bitbake/lib/bb/cooker.py', lineno: 25, function: <module>
0021:import bb, bb.exceptions, bb.command
0022:from bb import utils, data, parse, event, cache, providers, taskdata, runqueue, build
0023:import queue
0024:import signal
*** 0025:import prserv.serv
0026:import pyinotify
0027:import json
0028:import pickle
0029:import codecs
File: '/(省略)/layers/openembedded-core/bitbake/lib/prserv/serv.py', lineno: 7, function: <module>
0003:#
0004:
0005:import os,sys,logging
0006:import signal, time
*** 0007:from xmlrpc.server import SimpleXMLRPCServer, SimpleXMLRPCRequestHandler
0008:import threading
0009:import queue
0010:import socket
0011:import io
File: '/usr/lib/python3.8/xmlrpc/server.py', lineno: 117, function: <module>
0113:import socketserver
0114:import sys
0115:import os
0116:import re
*** 0117:import pydoc
0118:import traceback
0119:try:
0120: import fcntl
0121:except ImportError:
File: '/usr/lib/python3.8/pydoc.py', lineno: 370, function: <module>
0366: return module
0367:
0368:# ---------------------------------------------------- formatter base class
0369:
*** 0370:class Doc:
0371:
0372: PYTHONDOCS = os.environ.get("PYTHONDOCS",
0373: "https://docs.python.org/%d.%d/library"
0374: % sys.version_info[:2])
File: '/usr/lib/python3.8/pydoc.py', lineno: 400, function: Doc
0396: raise TypeError(message)
0397:
0398: docmodule = docclass = docroutine = docother = docproperty = docdata = fail
0399:
*** 0400: def getdocloc(self, object, basedir=sysconfig.get_path('stdlib')):
0401: """Return the location of module docs or None"""
0402:
0403: try:
0404: file = inspect.getabsfile(object)
File: '/usr/lib/python3.8/sysconfig.py', lineno: 525, function: get_path
0521: """Return a path corresponding to the scheme.
0522:
0523: ``scheme`` is the install scheme name.
0524: """
*** 0525: return get_paths(scheme, vars, expand)[name]
0526:
0527:
0528:def get_config_vars(*args):
0529: """With no arguments, return a dictionary of all configuration
File: '/usr/lib/python3.8/sysconfig.py', lineno: 515, function: get_paths
0511: ``scheme`` is the install scheme name. If not provided, it will
0512: return the default scheme for the current platform.
0513: """
0514: if expand:
*** 0515: return _expand_vars(scheme, vars)
0516: else:
0517: return _INSTALL_SCHEMES[scheme]
0518:
0519:
File: '/usr/lib/python3.8/sysconfig.py', lineno: 177, function: _expand_vars
0173:def _expand_vars(scheme, vars):
0174: res = {}
0175: if vars is None:
0176: vars = {}
*** 0177: _extend_dict(vars, get_config_vars())
0178:
0179: for key, value in _INSTALL_SCHEMES[scheme].items():
0180: if os.name in ('posix', 'nt'):
0181: value = os.path.expanduser(value)
File: '/usr/lib/python3.8/sysconfig.py', lineno: 563, function: get_config_vars
0559:
0560: if os.name == 'nt':
0561: _init_non_posix(_CONFIG_VARS)
0562: if os.name == 'posix':
*** 0563: _init_posix(_CONFIG_VARS)
0564: # For backward compatibility, see issue19555
0565: SO = _CONFIG_VARS.get('EXT_SUFFIX')
0566: if SO is not None:
0567: _CONFIG_VARS['SO'] = SO
File: '/usr/lib/python3.8/sysconfig.py', lineno: 431, function: _init_posix
0427:def _init_posix(vars):
0428: """Initialize the module as appropriate for POSIX systems."""
0429: # _sysconfigdata is generated at build time, see _generate_posix_vars()
0430: name = _get_sysconfigdata_name()
*** 0431: _temp = __import__(name, globals(), locals(), ['build_time_vars'], 0)
0432: build_time_vars = _temp.build_time_vars
0433: vars.update(build_time_vars)
0434:
0435:def _init_non_posix(vars):
Exception: ModuleNotFoundError: No module named '_sysconfigdata'