Fails to build with zetup 0.2.63

[risicle]

Previously working with zetup 0.2.52...

  Resolving setup requirement zetup >= 0.2.34:
  zetup 0.2.63 (/nix/store/dnijahwkz2jlavwiahy5v4k2726fkgdb-python3.7-zetup-0.2.63/lib/python3.7/site-packages)
  Resolving setup requirement setuptools-scm>=3.0.0->zetup >= 0.2.34:
  setuptools-scm 3.3.3 (/nix/store/07yiy4iksb889rign2f18hazhmr4r04l-python3.7-setuptools_scm-3.3.3/lib/python3.7/site-packages)
  Traceback (most recent call last):
    File "nix_run_setup", line 8, in <module>
      exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\\r\\n', '\\n'), __file__, 'exec'))
    File "setup.py", line 88, in <module>
      setup_requires=SETUP_REQUIRES + (zfg.SETUP_REQUIRES or []),
  TypeError: can only concatenate list (not "Requirements") to list

Same result, python 2.7 and 3.7, macos and linux.