Free-threaded Python Library Compatibility Checker

  error: subprocess-exited-with-error
  
  × Building wheel for pydantic-core (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> [15 lines of output]
      Running `maturin pep517 build-wheel -i /tmp/tmpw2cxjtjy/venv/bin/python --compatibility off`
      📦 Including license file `LICENSE`
      🍹 Building a mixed python/rust project
      🔗 Found pyo3 bindings
      🐍 Found CPython 3.14t at /tmp/tmpw2cxjtjy/venv/bin/python
      📡 Using build options features, bindings from pyproject.toml
      warning: unused manifest key: lints
      error: package `icu_collections v1.5.0` cannot be built because it requires rustc 1.67 or newer, while the currently active rustc version is 1.63.0
      Either upgrade to rustc 1.67 or newer, or use
      cargo update -p icu_collections@1.5.0 --precise ver
      where `ver` is the latest version of `icu_collections` 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-3.14-64bit" PYO3_PYTHON="/tmp/tmpw2cxjtjy/venv/bin/python" PYTHON_SYS_EXECUTABLE="/tmp/tmpw2cxjtjy/venv/bin/python" "cargo" "rustc" "--features" "pyo3/extension-module" "--message-format" "json-render-diagnostics" "--manifest-path" "/tmp/pip-install-a1t1a9ln/pydantic-core_34badde0d2744c79a3637cfed3747dde/Cargo.toml" "--release" "--lib"`
      Error: command ['maturin', 'pep517', 'build-wheel', '-i', '/tmp/tmpw2cxjtjy/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 pydantic-core
error: failed-wheel-build-for-install

× Failed to build installable wheels for some pyproject.toml based projects
╰─> pydantic-core

ck (most recent call last):
        File "/tmp/pip-build-env-539g6bzc/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-bqsrgah_/grpcio_30d74c0ce5aa4c84812ff04425a27795/src/python/grpcio/_spawn_patch.py", line 66, in _commandfile_spawn
          _classic_spawn(self, command, **kwargs)
          ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/pip-build-env-539g6bzc/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-539g6bzc/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-bqsrgah_/grpcio_30d74c0ce5aa4c84812ff04425a27795/src/python/grpcio/commands.py", line 282, in build_extensions
          build_ext.build_ext.build_extensions(self)
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
        File "/tmp/pip-build-env-539g6bzc/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-539g6bzc/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-539g6bzc/overlay/lib/python3.14t/site-packages/setuptools/command/build_ext.py", line 261, in build_extension
          _build_ext.build_extension(self, ext)
          ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^
        File "/tmp/pip-build-env-539g6bzc/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-bqsrgah_/grpcio_30d74c0ce5aa4c84812ff04425a27795/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-bqsrgah_/grpcio_30d74c0ce5aa4c84812ff04425a27795/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-bqsrgah_/grpcio_30d74c0ce5aa4c84812ff04425a27795/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-539g6bzc/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)

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

  error: subprocess-exited-with-error
  
  × Building wheel for cryptography (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> [24 lines of output]
      Running `maturin pep517 build-wheel -i /tmp/tmprhe1qha0/venv/bin/python --compatibility off`
          Blocking waiting for file lock on package cache
          Blocking waiting for file lock on package cache
          Blocking waiting for file lock on package cache
      🍹 Building a mixed python/rust project
      🔗 Found pyo3 bindings with abi3 support
      🐍 Found CPython 3.14t at /tmp/tmprhe1qha0/venv/bin/python
      📡 Using build options locked from pyproject.toml
      ⚠️ Warning: CPython 3.14t at /tmp/tmprhe1qha0/venv/bin/python does not yet support abi3 so the build artifacts will be version-specific.
      warning: /tmp/pip-install-772kc_0o/cryptography_cd802f131209414c9020f7ad3fdbc6ce/src/rust/cryptography-cffi/Cargo.toml: unused manifest key: lints
      warning: /tmp/pip-install-772kc_0o/cryptography_cd802f131209414c9020f7ad3fdbc6ce/src/rust/cryptography-openssl/Cargo.toml: unused manifest key: lints
      warning: /tmp/pip-install-772kc_0o/cryptography_cd802f131209414c9020f7ad3fdbc6ce/src/rust/Cargo.toml: unused manifest key: lints
      warning: /tmp/pip-install-772kc_0o/cryptography_cd802f131209414c9020f7ad3fdbc6ce/src/rust/cryptography-key-parsing/Cargo.toml: unused manifest key: lints
          Blocking waiting for file lock on package cache
          Blocking waiting for file lock on package cache
          Blocking waiting for file lock on package cache
      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-3.14-64bit" PYO3_PYTHON="/tmp/tmprhe1qha0/venv/bin/python" PYTHON_SYS_EXECUTABLE="/tmp/tmprhe1qha0/venv/bin/python" "cargo" "rustc" "--message-format" "json-render-diagnostics" "--locked" "--manifest-path" "/tmp/pip-install-772kc_0o/cryptography_cd802f131209414c9020f7ad3fdbc6ce/src/rust/Cargo.toml" "--release" "--lib"`
      Error: command ['maturin', 'pep517', 'build-wheel', '-i', '/tmp/tmprhe1qha0/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)