:: Synchronizing package databases...
 build-support-manual downloading...
 build-support downloading...
 core-staging downloading...
 extra-staging downloading...
 core-testing downloading...
 core downloading...
 extra-testing downloading...
 extra downloading...
:: Starting full system upgrade...
 there is nothing to do
==> Building in chroot for [extra-staging-with-build-support] (pentium4)...
==> Synchronizing chroot copy [/var/lib/archbuild/extra-staging-with-build-support-pentium4/root] -> [build]...done
==> Making package: python-jupyter-packaging 0.12.3-6.0 (Sat May 10 13:21:58 2025)
==> Retrieving sources...
  -> Found jupyter_packaging-0.12.3.tar.gz
==> Validating source files with sha256sums...
    jupyter_packaging-0.12.3.tar.gz ... Passed
gpg: Warning: using insecure memory!
==> Appending keys from archlinux32.gpg...
gpg: Warning: using insecure memory!
gpg: Warning: using insecure memory!
gpg: Warning: using insecure memory!
gpg: Warning: using insecure memory!
gpg: Warning: using insecure memory!
gpg: Warning: using insecure memory!
gpg: Warning: using insecure memory!
gpg: Warning: using insecure memory!
gpg: Warning: using insecure memory!
gpg: Warning: using insecure memory!
gpg: Warning: using insecure memory!
gpg: Warning: using insecure memory!
gpg: Warning: using insecure memory!
gpg: Warning: using insecure memory!
==> Updating trust database...
gpg: Warning: using insecure memory!
gpg: next trustdb check due at 2025-07-01
==> Making package: python-jupyter-packaging 0.12.3-6.0 (Sat May 10 13:22:01 2025)
==> Checking runtime dependencies...
==> Installing missing dependencies...
resolving dependencies...
looking for conflicting packages...

Packages (4) python-deprecation-2.1.0-9.1  python-setuptools-1-1.3  python-tomlkit-0.13.2-1.0  python-wheel-1-1.3

Total Installed Size:  14.03 MiB

:: Proceed with installation? [Y/n] 
checking keyring...
checking package integrity...
loading package files...
checking for file conflicts...
:: Processing package changes...
installing python-deprecation...
installing python-wheel...
installing python-tomlkit...
installing python-setuptools...
:: Running post-transaction hooks...
(1/1) Arming ConditionNeedsUpdate...
==> Checking buildtime dependencies...
==> Installing missing dependencies...
resolving dependencies...
looking for conflicting packages...

Packages (12) python-editables-0.5-5.0  python-iniconfig-2.0.0-5.1  python-pathspec-0.12.1-3.0  python-pluggy-1.5.0-3.0  python-pyproject-hooks-1.2.0-3.1  python-pytest-1:8.3.3-1.0  python-trove-classifiers-2024.10.21.16-1.0  python-build-1-1.3  python-hatchling-1.25.0-1.0  python-installer-1-1.3  python-pytest-mock-3.14.0-2.0  python-pytest-timeout-2.3.1-4.0

Total Installed Size:  7.08 MiB

:: Proceed with installation? [Y/n] 
checking keyring...
checking package integrity...
loading package files...
checking for file conflicts...
:: Processing package changes...
installing python-pyproject-hooks...
installing python-build...
installing python-installer...
installing python-pathspec...
installing python-pluggy...
installing python-editables...
installing python-trove-classifiers...
installing python-hatchling...
installing python-iniconfig...
installing python-pytest...
installing python-pytest-mock...
installing python-pytest-timeout...
:: Running post-transaction hooks...
(1/1) Arming ConditionNeedsUpdate...
==> Retrieving sources...
  -> Found jupyter_packaging-0.12.3.tar.gz
==> WARNING: Skipping all source file integrity checks.
==> Extracting sources...
  -> Extracting jupyter_packaging-0.12.3.tar.gz with bsdtar
==> Starting build()...
* Getting build dependencies for wheel...

Traceback (most recent call last):
  File "/usr/lib/python3.13/site-packages/pyproject_hooks/_impl.py", line 402, in _call_hook
    raise BackendUnavailable(
    ...<4 lines>...
    )
pyproject_hooks._impl.BackendUnavailable: Cannot import 'hatchling.build'

ERROR Backend 'hatchling.build' is not available.
==> ERROR: A failure occurred in build().
    Aborting...
==> ERROR: Build failed, check /var/lib/archbuild/extra-staging-with-build-support-pentium4/build/build
used straw: :with_build_support:
build@euronuc.lan