Free-threaded Python Library Compatibility Checker

_out["return_val"] = hook(**hook_input["kwargs"])
                                   ~~~~^^^^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/tmpopne9hgs/venv/lib/python3.13t/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 280, in build_wheel
          return _build_backend().build_wheel(
                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
              wheel_directory, config_settings, metadata_directory
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
          )
          ^
        File "/tmp/pip-build-env-vp_4jxmh/overlay/lib/python3.13t/site-packages/setuptools/build_meta.py", line 435, in build_wheel
          return _build(['bdist_wheel', '--dist-info-dir', str(metadata_directory)])
        File "/tmp/pip-build-env-vp_4jxmh/overlay/lib/python3.13t/site-packages/setuptools/build_meta.py", line 423, in _build
          return self._build_with_temp_dir(
                 ~~~~~~~~~~~~~~~~~~~~~~~~~^
              cmd,
              ^^^^
          ...<3 lines>...
              self._arbitrary_args(config_settings),
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
          )
          ^
        File "/tmp/pip-build-env-vp_4jxmh/overlay/lib/python3.13t/site-packages/setuptools/build_meta.py", line 404, in _build_with_temp_dir
          self.run_setup()
          ~~~~~~~~~~~~~~^^
        File "/tmp/pip-build-env-vp_4jxmh/overlay/lib/python3.13t/site-packages/setuptools/build_meta.py", line 317, in run_setup
          exec(code, locals())
          ~~~~^^^^^^^^^^^^^^^^
        File "<string>", line 202, in <module>
        File "/tmp/pip-build-env-vp_4jxmh/overlay/lib/python3.13t/site-packages/setuptools/__init__.py", line 115, in setup
          return distutils.core.setup(**attrs)
                 ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
        File "/tmp/pip-build-env-vp_4jxmh/overlay/lib/python3.13t/site-packages/setuptools/_distutils/core.py", line 186, in setup
          return run_commands(dist)
        File "/tmp/pip-build-env-vp_4jxmh/overlay/lib/python3.13t/site-packages/setuptools/_distutils/core.py", line 202, in run_commands
          dist.run_commands()
          ~~~~~~~~~~~~~~~~~^^
        File "/tmp/pip-build-env-vp_4jxmh/overlay/lib/python3.13t/site-packages/setuptools/_distutils/dist.py", line 1002, in run_commands
          self.run_command(cmd)
          ~~~~~~~~~~~~~~~~^^^^^
        File "/tmp/pip-build-env-vp_4jxmh/overlay/lib/python3.13t/site-packages/setuptools/dist.py", line 1102, in run_command
          super().run_command(command)
          ~~~~~~~~~~~~~~~~~~~^^^^^^^^^
        File "/tmp/pip-build-env-vp_4jxmh/overlay/lib/python3.13t/site-packages/setuptools/_distutils/dist.py", line 1021, in run_command
          cmd_obj.run()
          ~~~~~~~~~~~^^
        File "/tmp/pip-build-env-vp_4jxmh/overlay/lib/python3.13t/site-packages/setuptools/command/bdist_wheel.py", line 370, in run
          self.run_command("build")
          ~~~~~~~~~~~~~~~~^^^^^^^^^
        File "/tmp/pip-build-env-vp_4jxmh/overlay/lib/python3.13t/site-packages/setuptools/_distutils/cmd.py", line 357, in run_command
          self.distribution.run_command(command)
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
        File "/tmp/pip-build-env-vp_4jxmh/overlay/lib/python3.13t/site-packages/setuptools/dist.py", line 1102, in run_command
          super().run_command(command)
          ~~~~~~~~~~~~~~~~~~~^^^^^^^^^
        File "/tmp/pip-build-env-vp_4jxmh/overlay/lib/python3.13t/site-packages/setuptools/_distutils/dist.py", line 1021, in run_command
          cmd_obj.run()
          ~~~~~~~~~~~^^
        File "/tmp/pip-build-env-vp_4jxmh/overlay/lib/python3.13t/site-packages/setuptools/_distutils/command/build.py", line 135, in run
          self.run_command(cmd_name)
          ~~~~~~~~~~~~~~~~^^^^^^^^^^
        File "/tmp/pip-build-env-vp_4jxmh/overlay/lib/python3.13t/site-packages/setuptools/_distutils/cmd.py", line 357, in run_command
          self.distribution.run_command(command)
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
        File "/tmp/pip-build-env-vp_4jxmh/overlay/lib/python3.13t/site-packages/setuptools/dist.py", line 1102, in run_command
          super().run_command(command)
          ~~~~~~~~~~~~~~~~~~~^^^^^^^^^
        File "/tmp/pip-build-env-vp_4jxmh/overlay/lib/python3.13t/site-packages/setuptools/_distutils/dist.py", line 1021, in run_command
          cmd_obj.run()
          ~~~~~~~~~~~^^
        File "<string>", line 169, in run
        File "/root/.local/share/uv/python/cpython-3.13.3+freethreaded-linux-x86_64-gnu/lib/python3.13t/subprocess.py", line 419, in check_call
          raise CalledProcessError(retcode, cmd)
      subprocess.CalledProcessError: Command '['make']' returned non-zero exit status 2.
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for pynacl
ERROR: Failed to build installable wheels for some pyproject.toml based projects (cryptography, pynacl)

evel='final', serial=0)
      setup.py:217:<module>(): list(sys.version_info)=[3, 13, 9, 'final', 0]
      setup.py:217:<module>(): sysconfig.get_config_var("Py_GIL_DISABLED")=1
      setup.py:217:<module>(): sys._is_gil_enabled()=False
      setup.py:217:<module>(): CPU bits: 64
      setup.py:217:<module>(): sys.argv (3):
      setup.py:217:<module>():     0: '/tmp/tmpq8chjffv/venv/lib/python3.13t/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py'
      setup.py:217:<module>():     1: 'prepare_metadata_for_build_wheel'
      setup.py:217:<module>():     2: '/tmp/tmps88t_kea'
      setup.py:217:<module>(): os.environ (33):
      setup.py:217:<module>():     CLOUD_RUN_EXECUTION: 'lib-tester-313t-workers-kz52m'
      setup.py:217:<module>():     CLOUD_RUN_JOB: 'lib-tester-313t-workers'
      setup.py:217:<module>():     CLOUD_RUN_TASK_ATTEMPT: '0'
      setup.py:217:<module>():     CLOUD_RUN_TASK_COUNT: '1'
      setup.py:217:<module>():     CLOUD_RUN_TASK_INDEX: '0'
      setup.py:217:<module>():     DB_NAME: 'python_compatibility'
      setup.py:217:<module>():     DB_PASS: 'QGC3Do9jcDhMmHC3Ub6o'
      setup.py:217:<module>():     DB_USER: 'postgres'
      setup.py:217:<module>():     GCLOUD: '1'
      setup.py:217:<module>():     GPG_KEY: '7169605F62C751356D054A26A821E680E5FA6305'
      setup.py:217:<module>():     HOME: '/root'
      setup.py:217:<module>():     INSTANCE_CONNECTION_NAME: 'gil2free:us-central1:gil2free-db'
      setup.py:217:<module>():     LC_CTYPE: 'C.UTF-8'
      setup.py:217:<module>():     PATH: '/tmp/pip-build-env-_a05xaw0/overlay/bin:/tmp/pip-build-env-_a05xaw0/normal/bin:/app/.venv/bin:/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'
      setup.py:217:<module>():     PIP_BUILD_TRACKER: '/tmp/pip-build-tracker-rv6uxv9u'
      setup.py:217:<module>():     PWD: '/app'
      setup.py:217:<module>():     PYTHONNOUSERSITE: '1'
      setup.py:217:<module>():     PYTHONPATH: '/tmp/pip-build-env-_a05xaw0/site'
      setup.py:217:<module>():     PYTHONUNBUFFERED: '1'
      setup.py:217:<module>():     PYTHON_SHA256: 'ed5ef34cda36cfa2f3a340f07cac7e7814f91c7f3c411f6d3562323a866c5c66'
      setup.py:217:<module>():     PYTHON_VERSION: '3.13t'
      setup.py:217:<module>():     SHLVL: '1'
      setup.py:217:<module>():     UV: '/usr/local/bin/uv'
      setup.py:217:<module>():     UV_NO_SYNC: '1'
      setup.py:217:<module>():     UV_RUN_RECURSION_DEPTH: '1'
      setup.py:217:<module>():     UV_SYSTEM_PYTHON: '1'
      setup.py:217:<module>():     UV_TOOL_BIN_DIR: '/usr/local/bin'
      setup.py:217:<module>():     VIRTUAL_ENV: '/app/.venv'
      setup.py:217:<module>():     WORKER_COUNT: '4'
      setup.py:217:<module>():     WORKER_ID: '1'
      setup.py:217:<module>():     _: '/usr/local/bin/uv'
      setup.py:217:<module>():     _PYPROJECT_HOOKS_BACKEND_PATH: '/tmp/pip-install-ge0loqxb/pymupdf_8cef9da63efd44da8b808675e8589c47'
      setup.py:217:<module>():     _PYPROJECT_HOOKS_BUILD_BACKEND: 'setup'
      setup.py:237:<module>(): PYMUPDF_SETUP_URL_WHEEL=None
      setup.py:240:<module>(): PYMUPDF_SETUP_DUMMY=None
      Traceback (most recent call last):
        File "/tmp/tmpq8chjffv/venv/lib/python3.13t/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 389, in <module>
          main()
          ~~~~^^
        File "/tmp/tmpq8chjffv/venv/lib/python3.13t/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 373, in main
          json_out["return_val"] = hook(**hook_input["kwargs"])
                                   ~~~~^^^^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/tmpq8chjffv/venv/lib/python3.13t/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 178, in prepare_metadata_for_build_wheel
          whl_basename = backend.build_wheel(metadata_directory, config_settings)
        File "/tmp/pip-install-ge0loqxb/pymupdf_8cef9da63efd44da8b808675e8589c47/pipcl.py", line 737, in build_wheel
          wheel_name = self.wheel_name()
        File "/tmp/pip-install-ge0loqxb/pymupdf_8cef9da63efd44da8b808675e8589c47/pipcl.py", line 970, in wheel_name
          ret = f'{_normalise2(self.name)}-{self.version}-{self.tag_python()}-{self.tag_abi()}-{self.tag_platform()}.whl'
                                                                               ~~~~~~~~~~~~^^
        File "/tmp/pip-install-ge0loqxb/pymupdf_8cef9da63efd44da8b808675e8589c47/pipcl.py", line 921, in tag_abi
          assert Py_GIL_DISABLED != 1, \
                 ^^^^^^^^^^^^^^^^^^^^
      AssertionError: py_limited_api and Py_GIL_DISABLED are not supported together as of 2026-02-20, e.g. see PEP 803 and PEP 809.
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> pymupdf

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.

  error: subprocess-exited-with-error
  
  × Building wheel for cryptography (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> [21 lines of output]
      Running `maturin pep517 build-wheel -i /tmp/tmptfir4hej/venv/bin/python --compatibility off`
      📦 Including license file "/tmp/pip-install-xaldvfz6/cryptography_23de39d78fcb491ca021e8b4a6ee7652/LICENSE"
      📦 Including license file "/tmp/pip-install-xaldvfz6/cryptography_23de39d78fcb491ca021e8b4a6ee7652/LICENSE.APACHE"
      📦 Including license file "/tmp/pip-install-xaldvfz6/cryptography_23de39d78fcb491ca021e8b4a6ee7652/LICENSE.BSD"
      🍹 Building a mixed python/rust project
      🔗 Found pyo3 bindings with abi3 support
      🐍 Found CPython 3.13t at /tmp/tmptfir4hej/venv/bin/python
      📡 Using build options locked from pyproject.toml
      ⚠️ Warning: CPython 3.13t at /tmp/tmptfir4hej/venv/bin/python does not yet support abi3 so the build artifacts will be version-specific.
      warning: /tmp/pip-install-xaldvfz6/cryptography_23de39d78fcb491ca021e8b4a6ee7652/src/rust/cryptography-key-parsing/Cargo.toml: unused manifest key: lints
      warning: /tmp/pip-install-xaldvfz6/cryptography_23de39d78fcb491ca021e8b4a6ee7652/src/rust/cryptography-cffi/Cargo.toml: unused manifest key: lints
      warning: /tmp/pip-install-xaldvfz6/cryptography_23de39d78fcb491ca021e8b4a6ee7652/src/rust/cryptography-openssl/Cargo.toml: unused manifest key: lints
      warning: /tmp/pip-install-xaldvfz6/cryptography_23de39d78fcb491ca021e8b4a6ee7652/src/rust/Cargo.toml: unused manifest key: lints
      error: package `once_cell v1.21.3` cannot be built because it requires rustc 1.65 or newer, while the currently active rustc version is 1.63.0
      Either upgrade to rustc 1.65 or newer, or use
      cargo update -p once_cell@1.21.3 --precise ver
      where `ver` is the latest version of `once_cell` supporting rustc 1.63.0
      💥 maturin failed
        Caused by: Failed to build a native library through cargo
        Caused by: Cargo build finished with "exit status: 101": `env -u CARGO PYO3_ENVIRONMENT_SIGNATURE="cpython-3.13-64bit" PYO3_PYTHON="/tmp/tmptfir4hej/venv/bin/python" PYTHON_SYS_EXECUTABLE="/tmp/tmptfir4hej/venv/bin/python" "cargo" "rustc" "--message-format" "json-render-diagnostics" "--locked" "--manifest-path" "/tmp/pip-install-xaldvfz6/cryptography_23de39d78fcb491ca021e8b4a6ee7652/src/rust/Cargo.toml" "--release" "--lib"`
      Error: command ['maturin', 'pep517', 'build-wheel', '-i', '/tmp/tmptfir4hej/venv/bin/python', '--compatibility', 'off'] returned non-zero exit status 1
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for cryptography
ERROR: Failed to build installable wheels for some pyproject.toml based projects (cryptography)

ERROR: Could not install packages due to an OSError: [Errno 2] No such file or directory