Free-threaded Python Library Compatibility Checker

  error: subprocess-exited-with-error
  
  × Preparing metadata (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> [10 lines of output]
      Checking for Rust toolchain....
      Running `maturin pep517 write-dist-info --metadata-directory /tmp/pip-modern-metadata-a6miyjpb --interpreter /tmp/tmp1a9d382h/venv/bin/python`
      error: failed to parse lock file at: /tmp/pip-install-7_c95__e/tokenizers_604e8c9f70234285a69c91b90cd16c4e/bindings/python/Cargo.lock
      
      Caused by:
        lock file version `4` was found, but this version of Cargo does not understand this lock file, perhaps Cargo needs to be updated?
      💥 maturin failed
        Caused by: Cargo metadata failed. Does your crate compile with `cargo build`?
        Caused by: `cargo metadata` exited with an error:
      Error running maturin: Command '['maturin', 'pep517', 'write-dist-info', '--metadata-directory', '/tmp/pip-modern-metadata-a6miyjpb', '--interpreter', '/tmp/tmp1a9d382h/venv/bin/python']' 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: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

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

  error: subprocess-exited-with-error
  
  × Preparing metadata (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> [10 lines of output]
      Checking for Rust toolchain....
      Running `maturin pep517 write-dist-info --metadata-directory /tmp/pip-modern-metadata-cx_diecq --interpreter /tmp/tmphq2nq4l5/venv/bin/python`
      error: failed to parse lock file at: /tmp/pip-install-xuoq773j/orjson_0bffb6a2e478428392cdc724160ef93b/Cargo.lock
      
      Caused by:
        lock file version `4` was found, but this version of Cargo does not understand this lock file, perhaps Cargo needs to be updated?
      💥 maturin failed
        Caused by: Cargo metadata failed. Does your crate compile with `cargo build`?
        Caused by: `cargo metadata` exited with an error:
      Error running maturin: Command '['maturin', 'pep517', 'write-dist-info', '--metadata-directory', '/tmp/pip-modern-metadata-cx_diecq', '--interpreter', '/tmp/tmphq2nq4l5/venv/bin/python']' 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: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

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

             ^~~~~~~~~~~
            |                                                                                          |
            |                                                                                          char *
      yaml.h:636:43: note: expected ‘yaml_char_t *’ {aka ‘unsigned char *’} but argument is of type ‘char *’
        636 |         yaml_char_t *anchor, yaml_char_t *tag, int implicit,
            |                              ~~~~~~~~~~~~~^~~
      _ruamel_yaml.c: At top level:
      _ruamel_yaml.c:31652:69: error: unknown type name ‘__pyx_vectorcallfunc’; did you mean ‘vectorcallfunc’?
      31652 | static PyObject *__Pyx_PyVectorcall_FastCallDict_kw(PyObject *func, __pyx_vectorcallfunc vc, PyObject *const *args, size_t nargs, PyObject *kw)
            |                                                                     ^~~~~~~~~~~~~~~~~~~~
            |                                                                     vectorcallfunc
      _ruamel_yaml.c:31697:80: error: unknown type name ‘__pyx_vectorcallfunc’; did you mean ‘vectorcallfunc’?
      31697 | static CYTHON_INLINE PyObject *__Pyx_PyVectorcall_FastCallDict(PyObject *func, __pyx_vectorcallfunc vc, PyObject *const *args, size_t nargs, PyObject *kw)
            |                                                                                ^~~~~~~~~~~~~~~~~~~~
            |                                                                                vectorcallfunc
      _ruamel_yaml.c: In function ‘__Pyx_CyFunction_CallAsMethod’:
      _ruamel_yaml.c:32386:6: error: unknown type name ‘__pyx_vectorcallfunc’; did you mean ‘vectorcallfunc’?
      32386 |      __pyx_vectorcallfunc vc = __Pyx_CyFunction_func_vectorcall(cyfunc);
            |      ^~~~~~~~~~~~~~~~~~~~
            |      vectorcallfunc
      _ruamel_yaml.c:2252:45: warning: initialization of ‘int’ from ‘vectorcallfunc’ {aka ‘struct _object * (*)(struct _object *, struct _object * const*, long unsigned int,  struct _object *)’} makes integer from pointer without a cast [-Wint-conversion]
       2252 | #define __Pyx_CyFunction_func_vectorcall(f) (((PyCFunctionObject*)f)->vectorcall)
            |                                             ^
      _ruamel_yaml.c:32386:32: note: in expansion of macro ‘__Pyx_CyFunction_func_vectorcall’
      32386 |      __pyx_vectorcallfunc vc = __Pyx_CyFunction_func_vectorcall(cyfunc);
            |                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      _ruamel_yaml.c:32389:16: warning: implicit declaration of function ‘__Pyx_PyVectorcall_FastCallDict’; did you mean ‘__Pyx_PyObject_FastCallDict’? [-Wimplicit-function-declaration]
      32389 |         return __Pyx_PyVectorcall_FastCallDict(func, vc, &PyTuple_GET_ITEM(args, 0), (size_t)PyTuple_GET_SIZE(args), kw);
            |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            |                __Pyx_PyObject_FastCallDict
      _ruamel_yaml.c:32389:16: warning: returning ‘int’ from a function with return type ‘PyObject *’ {aka ‘struct _object *’} makes pointer from integer without a cast [-Wint-conversion]
      32389 |         return __Pyx_PyVectorcall_FastCallDict(func, vc, &PyTuple_GET_ITEM(args, 0), (size_t)PyTuple_GET_SIZE(args), kw);
            |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      exiting tmpfile {'full_package_name': 'ruamel.yaml.clib', 'version_info': (0, 2, 14), '__version__': '0.2.14', 'version_timestamp': '2025-09-22 18:47:49', 'author': 'Anthon van der Neut', 'author_email': 'a.van.der.neut@ruamel.eu', 'description': 'C version of reader, parser and emitter for ruamel.yaml derived from libyaml', 'license': 'MIT', 'entry_points': None, 'nested': True, 'binary_only': True, 'since': 2019, 'ext_modules': [{'name': '_ruamel_yaml', 'src': ['_ruamel_yaml.c', 'api.c', 'writer.c', 'dumper.c', 'loader.c', 'reader.c', 'scanner.c', 'parser.c', 'emitter.c'], 'lib': [], 'test': '\n            int main(int argc, char* argv[])\n            {\n              /* prevent warning */\n              return 0;\n            }\n            '}], 'classifiers': ['Programming Language :: Python :: Implementation :: CPython', 'Topic :: Software Development :: Libraries :: Python Modules'], 'keywords': 'yaml 1.2 parser c-library config', 'wheels': {'windows': 'appveyor', 'linux': 'libyaml-devel', 'macos': 'builder@macos'}, 'url_doc': 'https://yaml.dev/doc/{full_package_name}/', 'supported': [(3, 9)], 'python_requires': '>=3.9', 'tox': {'env': '*'}, 'manifest': 'include README.md LICENSE setup.py *.c *.h *.pxd *.pyx'}
      error: command '/usr/bin/cc' failed with exit code 1
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for ruamel-yaml-clib
error: failed-wheel-build-for-install

× Failed to build installable wheels for some pyproject.toml based projects
╰─> ruamel-yaml-clib

ERROR: Could not find a version that satisfies the requirement torch==2.8.0 (from versions: none)
ERROR: No matching distribution found for torch==2.8.0