=> Bootstrap dependency digest>=20211023: found digest-20220214
===> Skipping vulnerability checks.
WARNING: No /usr/pkg/pkgdb/pkg-vulnerabilities file found.
WARNING: To fix run: `/usr/sbin/pkg_admin -K /usr/pkg/pkgdb fetch-pkg-vulnerabilities'.
===> Building for py39-pydyf-0.2.0
* Building wheel...

Traceback (most recent call last):
  File "/usr/pkg/lib/python3.9/site-packages/pep517/wrappers.py", line 332, in _call_hook
    raise BackendUnavailable(data.get('traceback', ''))
pep517.wrappers.BackendUnavailable: Traceback (most recent call last):
  File "/usr/pkg/lib/python3.9/site-packages/pep517/in_process/_in_process.py", line 89, in _build_backend
    obj = import_module(mod_path)
  File "/usr/pkg/lib/python3.9/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 972, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 984, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'flit_core'

ERROR Backend 'flit_core.buildapi' is not available.
*** Error code 1

Stop.
make[1]: stopped in /amd/pkgsrc/CHROOT/P/pkgsrc/print/py-pydyf
*** Error code 1

Stop.
make: stopped in /amd/pkgsrc/CHROOT/P/pkgsrc/print/py-pydyf