* Package:    dev-python/astor-0.7.1
 * Repository: gentoo
 * Maintainer: python@gentoo.org
 * USE:        abi_x86_64 amd64 elibc_glibc kernel_linux python_targets_python2_7 python_targets_python3_6 userland_GNU
 * FEATURES:   network-sandbox preserve-libs sandbox userpriv usersandbox
>>> Unpacking source...
>>> Unpacking astor-0.7.1.tar.gz to /var/tmp/portage/dev-python/astor-0.7.1/work
>>> Source unpacked in /var/tmp/portage/dev-python/astor-0.7.1/work
>>> Preparing source in /var/tmp/portage/dev-python/astor-0.7.1/work/astor-0.7.1 ...
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/dev-python/astor-0.7.1/work/astor-0.7.1 ...
>>> Source configured.
>>> Compiling source in /var/tmp/portage/dev-python/astor-0.7.1/work/astor-0.7.1 ...
 * python2_7: running distutils-r1_run_phase distutils-r1_python_compile
python2.7 setup.py build
Traceback (most recent call last):
  File "setup.py", line 17, in <module>
    setup(**config['options'])
  File "/usr/lib64/python2.7/site-packages/setuptools/__init__.py", line 145, in setup
    return distutils.core.setup(**attrs)
  File "/usr/lib64/python2.7/distutils/core.py", line 111, in setup
    _setup_distribution = dist = klass(attrs)
  File "/usr/lib64/python2.7/site-packages/setuptools/dist.py", line 447, in __init__
    k: v for k, v in attrs.items()
  File "/usr/lib64/python2.7/distutils/dist.py", line 287, in __init__
    self.finalize_options()
  File "/usr/lib64/python2.7/site-packages/setuptools/dist.py", line 735, in finalize_options
    ep.load()(self, ep.name, value)
  File "/usr/lib64/python2.7/site-packages/setuptools/dist.py", line 291, in check_specifier
    packaging.specifiers.SpecifierSet(value)
  File "/usr/lib64/python2.7/site-packages/setuptools/_vendor/packaging/specifiers.py", line 594, in __init__
    specifiers = [s.strip() for s in specifiers.split(",") if s.strip()]
AttributeError: 'SpecifierSet' object has no attribute 'split'
 * ERROR: dev-python/astor-0.7.1::gentoo failed (compile phase):
 *   (no error message)
 * 
 * Call stack:
 *     ebuild.sh, line  125:  Called src_compile
 *   environment, line 2620:  Called distutils-r1_src_compile
 *   environment, line  809:  Called _distutils-r1_run_foreach_impl 'distutils-r1_python_compile'
 *   environment, line  324:  Called python_foreach_impl 'distutils-r1_run_phase' 'distutils-r1_python_compile'
 *   environment, line 2164:  Called multibuild_foreach_variant '_python_multibuild_wrapper' 'distutils-r1_run_phase' 'distutils-r1_python_compile'
 *   environment, line 1524:  Called _multibuild_run '_python_multibuild_wrapper' 'distutils-r1_run_phase' 'distutils-r1_python_compile'
 *   environment, line 1522:  Called _python_multibuild_wrapper 'distutils-r1_run_phase' 'distutils-r1_python_compile'
 *   environment, line  527:  Called distutils-r1_run_phase 'distutils-r1_python_compile'
 *   environment, line  800:  Called distutils-r1_python_compile
 *   environment, line  670:  Called esetup.py 'build'
 *   environment, line 1068:  Called die
 * The specific snippet of code:
 *       "${@}" || die "${die_args[@]}";
 * 
 * If you need support, post the output of `emerge --info '=dev-python/astor-0.7.1::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=dev-python/astor-0.7.1::gentoo'`.
 * The complete build log is located at '/var/tmp/portage/dev-python/astor-0.7.1/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-python/astor-0.7.1/temp/environment'.
 * Working directory: '/var/tmp/portage/dev-python/astor-0.7.1/work/astor-0.7.1'
 * S: '/var/tmp/portage/dev-python/astor-0.7.1/work/astor-0.7.1'