Free-threaded Python Library Compatibility Checker

andom__mt19937.pyx.c.o -MF numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/meson-generated_numpy_random__mt19937.pyx.c.o.d -o numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/meson-generated_numpy_random__mt19937.pyx.c.o -c numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c
      numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:2358:80: error: unknown type name ‘__pyx_vectorcallfunc’; did you mean ‘vectorcallfunc’?
       2358 | static CYTHON_INLINE PyObject *__Pyx_PyVectorcall_FastCallDict(PyObject *func, __pyx_vectorcallfunc vc, PyObject *const *args, size_t nargs, PyObject *kw);
            |                                                                                ^~~~~~~~~~~~~~~~~~~~
            |                                                                                vectorcallfunc
      numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:11219:69: error: unknown type name ‘__pyx_vectorcallfunc’; did you mean ‘vectorcallfunc’?
      11219 | static PyObject *__Pyx_PyVectorcall_FastCallDict_kw(PyObject *func, __pyx_vectorcallfunc vc, PyObject *const *args, size_t nargs, PyObject *kw)
            |                                                                     ^~~~~~~~~~~~~~~~~~~~
            |                                                                     vectorcallfunc
      numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:11264:80: error: unknown type name ‘__pyx_vectorcallfunc’; did you mean ‘vectorcallfunc’?
      11264 | static CYTHON_INLINE PyObject *__Pyx_PyVectorcall_FastCallDict(PyObject *func, __pyx_vectorcallfunc vc, PyObject *const *args, size_t nargs, PyObject *kw)
            |                                                                                ^~~~~~~~~~~~~~~~~~~~
            |                                                                                vectorcallfunc
      numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c: In function ‘__Pyx_CyFunction_CallAsMethod’:
      numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:11953:6: error: unknown type name ‘__pyx_vectorcallfunc’; did you mean ‘vectorcallfunc’?
      11953 |      __pyx_vectorcallfunc vc = __Pyx_CyFunction_func_vectorcall(cyfunc);
            |      ^~~~~~~~~~~~~~~~~~~~
            |      vectorcallfunc
      numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:2448:45: 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]
       2448 | #define __Pyx_CyFunction_func_vectorcall(f) (((PyCFunctionObject*)f)->vectorcall)
            |                                             ^
      numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:11953:32: note: in expansion of macro ‘__Pyx_CyFunction_func_vectorcall’
      11953 |      __pyx_vectorcallfunc vc = __Pyx_CyFunction_func_vectorcall(cyfunc);
            |                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:11956:16: warning: implicit declaration of function ‘__Pyx_PyVectorcall_FastCallDict’; did you mean ‘__Pyx_PyObject_FastCallDict’? [-Wimplicit-function-declaration]
      11956 |         return __Pyx_PyVectorcall_FastCallDict(func, vc, &PyTuple_GET_ITEM(args, 0), (size_t)PyTuple_GET_SIZE(args), kw);
            |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            |                __Pyx_PyObject_FastCallDict
      numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:11956:16: warning: returning ‘int’ from a function with return type ‘PyObject *’ {aka ‘struct _object *’} makes pointer from integer without a cast [-Wint-conversion]
      11956 |         return __Pyx_PyVectorcall_FastCallDict(func, vc, &PyTuple_GET_ITEM(args, 0), (size_t)PyTuple_GET_SIZE(args), kw);
            |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      [501/530] Compiling C object numpy/random/_bounded_integers.cpython-314t-x86_64-linux-gnu.so.p/meson-generated_numpy_random__bounded_integers.pyx.c.o
      [502/530] Compiling C object numpy/random/_common.cpython-314t-x86_64-linux-gnu.so.p/meson-generated_numpy_random__common.pyx.c.o
      ninja: build stopped: subcommand failed.
      [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-vi62advo --interpreter /tmp/tmpcwnjt6ol/venv/bin/python`
      error: failed to parse lock file at: /tmp/pip-install-mhfpn55w/rpds-py_8562e74feb4649828a3611c202ac7e8b/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-vi62advo', '--interpreter', '/tmp/tmpcwnjt6ol/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.

andom__mt19937.pyx.c.o -MF numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/meson-generated_numpy_random__mt19937.pyx.c.o.d -o numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/meson-generated_numpy_random__mt19937.pyx.c.o -c numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c
      numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:2358:80: error: unknown type name ‘__pyx_vectorcallfunc’; did you mean ‘vectorcallfunc’?
       2358 | static CYTHON_INLINE PyObject *__Pyx_PyVectorcall_FastCallDict(PyObject *func, __pyx_vectorcallfunc vc, PyObject *const *args, size_t nargs, PyObject *kw);
            |                                                                                ^~~~~~~~~~~~~~~~~~~~
            |                                                                                vectorcallfunc
      numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:11219:69: error: unknown type name ‘__pyx_vectorcallfunc’; did you mean ‘vectorcallfunc’?
      11219 | static PyObject *__Pyx_PyVectorcall_FastCallDict_kw(PyObject *func, __pyx_vectorcallfunc vc, PyObject *const *args, size_t nargs, PyObject *kw)
            |                                                                     ^~~~~~~~~~~~~~~~~~~~
            |                                                                     vectorcallfunc
      numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:11264:80: error: unknown type name ‘__pyx_vectorcallfunc’; did you mean ‘vectorcallfunc’?
      11264 | static CYTHON_INLINE PyObject *__Pyx_PyVectorcall_FastCallDict(PyObject *func, __pyx_vectorcallfunc vc, PyObject *const *args, size_t nargs, PyObject *kw)
            |                                                                                ^~~~~~~~~~~~~~~~~~~~
            |                                                                                vectorcallfunc
      numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c: In function ‘__Pyx_CyFunction_CallAsMethod’:
      numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:11953:6: error: unknown type name ‘__pyx_vectorcallfunc’; did you mean ‘vectorcallfunc’?
      11953 |      __pyx_vectorcallfunc vc = __Pyx_CyFunction_func_vectorcall(cyfunc);
            |      ^~~~~~~~~~~~~~~~~~~~
            |      vectorcallfunc
      numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:2448:45: 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]
       2448 | #define __Pyx_CyFunction_func_vectorcall(f) (((PyCFunctionObject*)f)->vectorcall)
            |                                             ^
      numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:11953:32: note: in expansion of macro ‘__Pyx_CyFunction_func_vectorcall’
      11953 |      __pyx_vectorcallfunc vc = __Pyx_CyFunction_func_vectorcall(cyfunc);
            |                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:11956:16: warning: implicit declaration of function ‘__Pyx_PyVectorcall_FastCallDict’; did you mean ‘__Pyx_PyObject_FastCallDict’? [-Wimplicit-function-declaration]
      11956 |         return __Pyx_PyVectorcall_FastCallDict(func, vc, &PyTuple_GET_ITEM(args, 0), (size_t)PyTuple_GET_SIZE(args), kw);
            |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            |                __Pyx_PyObject_FastCallDict
      numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:11956:16: warning: returning ‘int’ from a function with return type ‘PyObject *’ {aka ‘struct _object *’} makes pointer from integer without a cast [-Wint-conversion]
      11956 |         return __Pyx_PyVectorcall_FastCallDict(func, vc, &PyTuple_GET_ITEM(args, 0), (size_t)PyTuple_GET_SIZE(args), kw);
            |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      [501/530] Compiling C object numpy/random/_common.cpython-314t-x86_64-linux-gnu.so.p/meson-generated_numpy_random__common.pyx.c.o
      [502/530] Compiling C object numpy/random/_bounded_integers.cpython-314t-x86_64-linux-gnu.so.p/meson-generated_numpy_random__bounded_integers.pyx.c.o
      ninja: build stopped: subcommand failed.
      [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
  
  × Building wheel for tiktoken (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> [69 lines of output]
      /tmp/pip-build-env-9uo4i8yq/overlay/lib/python3.14t/site-packages/setuptools/config/_apply_pyprojecttoml.py:82: SetuptoolsDeprecationWarning: `project.license` as a TOML table is deprecated
      !!
      
              ********************************************************************************
              Please use a simple string containing a SPDX expression for `project.license`. You can also use `project.license-files`. (Both options available on setuptools>=77.0.0).
      
              By 2026-Feb-18, you need to update your project and remove deprecated calls
              or your builds will no longer be supported.
      
              See https://packaging.python.org/en/latest/guides/writing-pyproject-toml/#license for details.
              ********************************************************************************
      
      !!
        corresp(dist, value, root_dir)
      running bdist_wheel
      running build
      running build_py
      creating build/lib.linux-x86_64-cpython-314t/tiktoken
      copying tiktoken/__init__.py -> build/lib.linux-x86_64-cpython-314t/tiktoken
      copying tiktoken/_educational.py -> build/lib.linux-x86_64-cpython-314t/tiktoken
      copying tiktoken/core.py -> build/lib.linux-x86_64-cpython-314t/tiktoken
      copying tiktoken/load.py -> build/lib.linux-x86_64-cpython-314t/tiktoken
      copying tiktoken/model.py -> build/lib.linux-x86_64-cpython-314t/tiktoken
      copying tiktoken/registry.py -> build/lib.linux-x86_64-cpython-314t/tiktoken
      creating build/lib.linux-x86_64-cpython-314t/tiktoken_ext
      copying tiktoken_ext/openai_public.py -> build/lib.linux-x86_64-cpython-314t/tiktoken_ext
      running egg_info
      writing tiktoken.egg-info/PKG-INFO
      writing dependency_links to tiktoken.egg-info/dependency_links.txt
      writing requirements to tiktoken.egg-info/requires.txt
      writing top-level names to tiktoken.egg-info/top_level.txt
      reading manifest file 'tiktoken.egg-info/SOURCES.txt'
      reading manifest template 'MANIFEST.in'
      warning: no files found matching 'Makefile'
      adding license file 'LICENSE'
      writing manifest file 'tiktoken.egg-info/SOURCES.txt'
      copying tiktoken/py.typed -> build/lib.linux-x86_64-cpython-314t/tiktoken
      running build_ext
      running build_rust
          Updating crates.io index
       Downloading crates ...
        Downloaded bit-set v0.5.3
        Downloaded bit-vec v0.6.3
        Downloaded rustc-hash v1.1.0
        Downloaded unicode-ident v1.0.18
        Downloaded serde_derive v1.0.219
        Downloaded serde v1.0.219
        Downloaded fancy-regex v0.13.0
        Downloaded proc-macro2 v1.0.95
        Downloaded quote v1.0.40
        Downloaded syn v2.0.101
        Downloaded regex-automata v0.4.9
        Downloaded bstr v1.12.0
      cargo rustc --lib --message-format=json-render-diagnostics --manifest-path Cargo.toml --release -v --features python pyo3/extension-module -- --crate-type cdylib
       Downloading crates ...
        Downloaded unindent v0.2.4
        Downloaded pyo3-macros v0.22.6
        Downloaded pyo3-build-config v0.22.6
        Downloaded indoc v2.0.6
        Downloaded once_cell v1.21.3
        Downloaded pyo3-ffi v0.22.6
        Downloaded pyo3-macros-backend v0.22.6
        Downloaded pyo3 v0.22.6
        Downloaded libc v0.2.172
      error: package `regex-automata v0.4.9` 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 regex-automata@0.4.9 --precise ver
      where `ver` is the latest version of `regex-automata` supporting rustc 1.63.0
      error: `cargo rustc --lib --message-format=json-render-diagnostics --manifest-path Cargo.toml --release -v --features 'python pyo3/extension-module' -- --crate-type cdylib` failed with code 101
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for tiktoken
ERROR: Failed to build installable wheels for some pyproject.toml based projects (tiktoken)

ck (most recent call last):
        File "/tmp/pip-build-env-lyks6tbi/overlay/lib/python3.14t/site-packages/setuptools/_distutils/compilers/C/unix.py", line 217, in _compile
          self.spawn(
          ~~~~~~~~~~^
              compiler_so_cxx + cc_args + [src, '-o', obj] + extra_postargs
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
          )
          ^
        File "/tmp/pip-install-62uzm4sh/grpcio_912ea332c2ef44078c67266c1f7a7a39/src/python/grpcio/_spawn_patch.py", line 66, in _commandfile_spawn
          _classic_spawn(self, command, **kwargs)
          ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/pip-build-env-lyks6tbi/overlay/lib/python3.14t/site-packages/setuptools/_distutils/compilers/C/base.py", line 1158, in spawn
          spawn(cmd, dry_run=self.dry_run, **kwargs)
          ~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/pip-build-env-lyks6tbi/overlay/lib/python3.14t/site-packages/setuptools/_distutils/spawn.py", line 93, in spawn
          raise DistutilsExecError(
              f"command {_debug(cmd)!r} failed with exit code {err.returncode}"
          ) from err
      distutils.errors.DistutilsExecError: command '/usr/bin/c++' failed with exit code 1
      
      During handling of the above exception, another exception occurred:
      
      Traceback (most recent call last):
        File "/tmp/pip-install-62uzm4sh/grpcio_912ea332c2ef44078c67266c1f7a7a39/src/python/grpcio/commands.py", line 282, in build_extensions
          build_ext.build_ext.build_extensions(self)
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
        File "/tmp/pip-build-env-lyks6tbi/overlay/lib/python3.14t/site-packages/setuptools/_distutils/command/build_ext.py", line 484, in build_extensions
          self._build_extensions_serial()
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
        File "/tmp/pip-build-env-lyks6tbi/overlay/lib/python3.14t/site-packages/setuptools/_distutils/command/build_ext.py", line 510, in _build_extensions_serial
          self.build_extension(ext)
          ~~~~~~~~~~~~~~~~~~~~^^^^^
        File "/tmp/pip-build-env-lyks6tbi/overlay/lib/python3.14t/site-packages/setuptools/command/build_ext.py", line 264, in build_extension
          _build_ext.build_extension(self, ext)
          ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^
        File "/tmp/pip-build-env-lyks6tbi/overlay/lib/python3.14t/site-packages/setuptools/_distutils/command/build_ext.py", line 565, in build_extension
          objects = self.compiler.compile(
              sources,
          ...<5 lines>...
              depends=ext.depends,
          )
        File "/tmp/pip-install-62uzm4sh/grpcio_912ea332c2ef44078c67266c1f7a7a39/src/python/grpcio/_parallel_compile_patch.py", line 70, in _parallel_compile
          multiprocessing.pool.ThreadPool(BUILD_EXT_COMPILER_JOBS).map(
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
              _compile_single_file, objects
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
          )
          ^
        File "/root/.local/share/uv/python/cpython-3.14.0a6+freethreaded-linux-x86_64-gnu/lib/python3.14t/multiprocessing/pool.py", line 367, in map
          return self._map_async(func, iterable, mapstar, chunksize).get()
                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
        File "/root/.local/share/uv/python/cpython-3.14.0a6+freethreaded-linux-x86_64-gnu/lib/python3.14t/multiprocessing/pool.py", line 774, in get
          raise self._value
        File "/root/.local/share/uv/python/cpython-3.14.0a6+freethreaded-linux-x86_64-gnu/lib/python3.14t/multiprocessing/pool.py", line 125, in worker
          result = (True, func(*args, **kwds))
                          ~~~~^^^^^^^^^^^^^^^
        File "/root/.local/share/uv/python/cpython-3.14.0a6+freethreaded-linux-x86_64-gnu/lib/python3.14t/multiprocessing/pool.py", line 48, in mapstar
          return list(map(*args))
        File "/tmp/pip-install-62uzm4sh/grpcio_912ea332c2ef44078c67266c1f7a7a39/src/python/grpcio/_parallel_compile_patch.py", line 65, in _compile_single_file
          self._compile(obj, src, ext, cc_args, extra_postargs, pp_opts)
          ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/pip-install-62uzm4sh/grpcio_912ea332c2ef44078c67266c1f7a7a39/src/python/grpcio/commands.py", line 264, in new_compile
          return old_compile(obj, src, ext, cc_args, extra_postargs, pp_opts)
        File "/tmp/pip-build-env-lyks6tbi/overlay/lib/python3.14t/site-packages/setuptools/_distutils/compilers/C/unix.py", line 223, in _compile
          raise CompileError(msg)
      distutils.compilers.C.errors.CompileError: command '/usr/bin/c++' 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 grpcio
ERROR: Failed to build installable wheels for some pyproject.toml based projects (grpcio)

ck (most recent call last):
        File "/tmp/pip-build-env-0nd5vm9j/overlay/lib/python3.14t/site-packages/setuptools/_distutils/compilers/C/unix.py", line 217, in _compile
          self.spawn(
          ~~~~~~~~~~^
              compiler_so_cxx + cc_args + [src, '-o', obj] + extra_postargs
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
          )
          ^
        File "/tmp/pip-install-3ld1rk9c/grpcio_00ca4b066cb342378f27ec8ef783643e/src/python/grpcio/_spawn_patch.py", line 66, in _commandfile_spawn
          _classic_spawn(self, command, **kwargs)
          ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/pip-build-env-0nd5vm9j/overlay/lib/python3.14t/site-packages/setuptools/_distutils/compilers/C/base.py", line 1158, in spawn
          spawn(cmd, dry_run=self.dry_run, **kwargs)
          ~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/pip-build-env-0nd5vm9j/overlay/lib/python3.14t/site-packages/setuptools/_distutils/spawn.py", line 93, in spawn
          raise DistutilsExecError(
              f"command {_debug(cmd)!r} failed with exit code {err.returncode}"
          ) from err
      distutils.errors.DistutilsExecError: command '/usr/bin/c++' failed with exit code 1
      
      During handling of the above exception, another exception occurred:
      
      Traceback (most recent call last):
        File "/tmp/pip-install-3ld1rk9c/grpcio_00ca4b066cb342378f27ec8ef783643e/src/python/grpcio/commands.py", line 282, in build_extensions
          build_ext.build_ext.build_extensions(self)
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
        File "/tmp/pip-build-env-0nd5vm9j/overlay/lib/python3.14t/site-packages/setuptools/_distutils/command/build_ext.py", line 484, in build_extensions
          self._build_extensions_serial()
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
        File "/tmp/pip-build-env-0nd5vm9j/overlay/lib/python3.14t/site-packages/setuptools/_distutils/command/build_ext.py", line 510, in _build_extensions_serial
          self.build_extension(ext)
          ~~~~~~~~~~~~~~~~~~~~^^^^^
        File "/tmp/pip-build-env-0nd5vm9j/overlay/lib/python3.14t/site-packages/setuptools/command/build_ext.py", line 264, in build_extension
          _build_ext.build_extension(self, ext)
          ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^
        File "/tmp/pip-build-env-0nd5vm9j/overlay/lib/python3.14t/site-packages/setuptools/_distutils/command/build_ext.py", line 565, in build_extension
          objects = self.compiler.compile(
              sources,
          ...<5 lines>...
              depends=ext.depends,
          )
        File "/tmp/pip-install-3ld1rk9c/grpcio_00ca4b066cb342378f27ec8ef783643e/src/python/grpcio/_parallel_compile_patch.py", line 70, in _parallel_compile
          multiprocessing.pool.ThreadPool(BUILD_EXT_COMPILER_JOBS).map(
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
              _compile_single_file, objects
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
          )
          ^
        File "/root/.local/share/uv/python/cpython-3.14.0a6+freethreaded-linux-x86_64-gnu/lib/python3.14t/multiprocessing/pool.py", line 367, in map
          return self._map_async(func, iterable, mapstar, chunksize).get()
                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
        File "/root/.local/share/uv/python/cpython-3.14.0a6+freethreaded-linux-x86_64-gnu/lib/python3.14t/multiprocessing/pool.py", line 774, in get
          raise self._value
        File "/root/.local/share/uv/python/cpython-3.14.0a6+freethreaded-linux-x86_64-gnu/lib/python3.14t/multiprocessing/pool.py", line 125, in worker
          result = (True, func(*args, **kwds))
                          ~~~~^^^^^^^^^^^^^^^
        File "/root/.local/share/uv/python/cpython-3.14.0a6+freethreaded-linux-x86_64-gnu/lib/python3.14t/multiprocessing/pool.py", line 48, in mapstar
          return list(map(*args))
        File "/tmp/pip-install-3ld1rk9c/grpcio_00ca4b066cb342378f27ec8ef783643e/src/python/grpcio/_parallel_compile_patch.py", line 65, in _compile_single_file
          self._compile(obj, src, ext, cc_args, extra_postargs, pp_opts)
          ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/pip-install-3ld1rk9c/grpcio_00ca4b066cb342378f27ec8ef783643e/src/python/grpcio/commands.py", line 264, in new_compile
          return old_compile(obj, src, ext, cc_args, extra_postargs, pp_opts)
        File "/tmp/pip-build-env-0nd5vm9j/overlay/lib/python3.14t/site-packages/setuptools/_distutils/compilers/C/unix.py", line 223, in _compile
          raise CompileError(msg)
      distutils.compilers.C.errors.CompileError: command '/usr/bin/c++' 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 grpcio
ERROR: Failed to build installable wheels for some pyproject.toml based projects (grpcio)