:: 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/slave2/extra-staging-with-build-support-pentium4/root] -> [slave2]...done
==> Making package: python-pbs-installer 2025.03.17-1.0 (Thu 27 Mar 2025 12:00:15 CET)
==> Retrieving sources...
  -> Found pbs-installer-2025.03.17.tar.gz
==> Validating source files with sha512sums...
    pbs-installer-2025.03.17.tar.gz ... Passed
==> Validating source files with b2sums...
    pbs-installer-2025.03.17.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 2025-06-16
==> Making package: python-pbs-installer 2025.03.17-1.0 (Thu Mar 27 12:00:20 2025)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> Installing missing dependencies...
resolving dependencies...
looking for conflicting packages...

Packages (6) python-pyproject-hooks-1.2.0-3.0  python-pyproject-metadata-0.9.0-1.0  python-tomli-w-1.0.0-7.1  python-build-1.2.2-3.0  python-installer-1-1.0  python-pdm-backend-2.4.3-1.0

Total Installed Size:  1.85 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-pyproject-metadata...
installing python-tomli-w...
installing python-pdm-backend...
Optional dependencies for python-pdm-backend
    python-setuptools: for setuptools support
    python-editables: for editables backend support
:: Running post-transaction hooks...
(1/1) Arming ConditionNeedsUpdate...
==> Retrieving sources...
  -> Found pbs-installer-2025.03.17.tar.gz
==> WARNING: Skipping all source file integrity checks.
==> Extracting sources...
  -> Extracting pbs-installer-2025.03.17.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 'pdm.backend'

ERROR Backend 'pdm.backend' is not available.
==> ERROR: A failure occurred in build().
    Aborting...
==> ERROR: Build failed, check /var/lib/archbuild/slave2/extra-staging-with-build-support-pentium4/slave2/build
used straw: :with_build_support:without_check:
slave2@eurobuild6