Package: python3-build
Version: 0.1.0-2
Severity: normal

As I was trying out the new PEP-517 build system, I installed python3-build and
tried to run it, only to get this stacktrace:

/tmp/build-env-axtchyw0/bin/python: No module named ensurepip
/tmp/build-env-axtchyw0/bin/python: No module named pip
Traceback (most recent call last):
  File "/usr/bin/pyproject-build", line 33, in <module>
    sys.exit(load_entry_point('build==0.1.0', 'console_scripts', 
'pyproject-build')())
  File "/usr/lib/python3/dist-packages/build/__main__.py", line 206, in 
entrypoint
    main(sys.argv[1:])
  File "/usr/lib/python3/dist-packages/build/__main__.py", line 202, in main
    build_package(args.srcdir, outdir, distributions, config_settings, not 
args.no_isolation, args.skip_dependencies)
  File "/usr/lib/python3/dist-packages/build/__main__.py", line 81, in 
build_package
    _build_in_isolated_env(builder, outdir, distributions)
  File "/usr/lib/python3/dist-packages/build/__main__.py", line 45, in 
_build_in_isolated_env
    with IsolatedEnvBuilder() as env:
  File "/usr/lib/python3/dist-packages/build/env.py", line 55, in __enter__
    executable, pip_executable = _create_isolated_env(self._path)
  File "/usr/lib/python3/dist-packages/build/env.py", line 187, in 
_create_isolated_env
    subprocess.check_call([executable, '-Im', 'pip', 'uninstall', 'setuptools', 
'-y'])
  File "/usr/lib/python3.9/subprocess.py", line 373, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['/tmp/build-env-axtchyw0/bin/python', 
'-Im', 'pip', 'uninstall', 'setuptools', '-y']' returned non-zero exit status 1.


I don't know why build requires pip (I don't think it should?), but in any case
it seems it should be added as a dependency.

-- System Information:
Debian Release: bullseye/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 5.9.0-4-amd64 (SMP w/4 CPU threads)
Kernel taint flags: TAINT_WARN, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_IE.UTF-8, LC_CTYPE=en_IE.UTF-8 (charmap=UTF-8), 
LANGUAGE=en_IE:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages python3-build depends on:
ii  python3            3.9.0-4
ii  python3-packaging  20.4-1
ii  python3-pep517     0.9.1-1
ii  python3-toml       0.10.1-1

python3-build recommends no packages.

Versions of packages python3-build suggests:
pn  python-build-doc  <none>

-- no debconf information

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