Free-threaded Python Library Compatibility Checker

Compatibility Results: CPython 3.13t and 3.14t

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Python 3.13t Compatibility Results

Library Version Build Result Error Details Last Updated At
sphinx-rtd-theme 3.1.0 Success - 2026-01-13 01:03:09
tf-keras-nightly 2.21.0.dev2026080809 Failed
ERROR: Could not find a version that satisfies the requirement tf-nightly~=2.21.0.dev (from tf-keras-nightly) (from versions: none)
ERROR: No matching distribution found for tf-nightly~=2.21.0.dev
2026-08-09 01:02:47
hypothesis 6.165.2 Failed
  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-6mmk3au3 --interpreter /tmp/tmp1cj1ruym/venv/bin/python`
      error: failed to parse lock file at: /tmp/pip-install-h3guy_d_/hypothesis_0fa553d510214ea7befd413e211b5d12/rust/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-6mmk3au3', '--interpreter', '/tmp/tmp1cj1ruym/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.
╰─> hypothesis

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.
2026-08-06 01:02:37
flask-login 0.6.3 Success - 2025-05-20 21:16:12
cachelib 0.15.4 Success - 2026-08-09 01:02:39
azure-keyvault-secrets 4.11.0 Success - 2026-04-17 01:02:34
langcodes 3.5.1 Success - 2025-12-03 01:02:33
uc-micro-py 2.0.0 Success - 2026-03-02 01:03:11
xgboost 3.4.0 Failed
  error: subprocess-exited-with-error
  
  × Preparing metadata (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> [54 lines of output]
      + meson setup /tmp/pip-install-n3kgfvbu/scipy_e1d37c3c9de044b599e85829ccf6d7d1 /tmp/pip-install-n3kgfvbu/scipy_e1d37c3c9de044b599e85829ccf6d7d1/.mesonpy-dftr8p55 -Dbuildtype=release -Db_ndebug=if-release -Db_vscrt=md --native-file=/tmp/pip-install-n3kgfvbu/scipy_e1d37c3c9de044b599e85829ccf6d7d1/.mesonpy-dftr8p55/meson-python-native-file.ini
      The Meson build system
      Version: 1.11.2
      Source dir: /tmp/pip-install-n3kgfvbu/scipy_e1d37c3c9de044b599e85829ccf6d7d1
      Build dir: /tmp/pip-install-n3kgfvbu/scipy_e1d37c3c9de044b599e85829ccf6d7d1/.mesonpy-dftr8p55
      Build type: native build
      Project name: scipy
      Project version: 1.18.0
      C compiler for the host machine: cc (gcc 12.2.0 "cc (Debian 12.2.0-14+deb12u1) 12.2.0")
      C linker for the host machine: cc ld.bfd 2.40
      C++ compiler for the host machine: c++ (gcc 12.2.0 "c++ (Debian 12.2.0-14+deb12u1) 12.2.0")
      C++ linker for the host machine: c++ ld.bfd 2.40
      Cython compiler for the host machine: cython (cython 3.2.9)
      Host machine cpu family: x86_64
      Host machine cpu: x86_64
      Program python found: YES (/tmp/tmpgzj6zcvb/venv/bin/python)
      Did not find pkg-config by name 'pkg-config'
      Found pkg-config: NO
      Run-time dependency python found: YES 3.13
      Program cython found: YES (/tmp/pip-build-env-xzs3etxw/overlay/bin/cython)
      Compiler for C supports arguments -Wno-unused-but-set-variable: YES
      Compiler for C supports arguments -Wno-unused-function: YES
      Compiler for C supports arguments -Wno-conversion: YES
      Compiler for C supports arguments -Wno-misleading-indentation: YES
      Library m found: YES
      
      ../meson.build:91:2: ERROR: Unknown compiler(s): [['gfortran'], ['flang-new'], ['flang'], ['nvfortran'], ['pgfortran'], ['ifort'], ['ifx'], ['g95']]
      The following exception(s) were encountered:
      Running `gfortran --help` gave "[Errno 2] No such file or directory: 'gfortran'"
      Running `gfortran --version` gave "[Errno 2] No such file or directory: 'gfortran'"
      Running `gfortran -V` gave "[Errno 2] No such file or directory: 'gfortran'"
      Running `flang-new --help` gave "[Errno 2] No such file or directory: 'flang-new'"
      Running `flang-new --version` gave "[Errno 2] No such file or directory: 'flang-new'"
      Running `flang-new -V` gave "[Errno 2] No such file or directory: 'flang-new'"
      Running `flang --help` gave "[Errno 2] No such file or directory: 'flang'"
      Running `flang --version` gave "[Errno 2] No such file or directory: 'flang'"
      Running `flang -V` gave "[Errno 2] No such file or directory: 'flang'"
      Running `nvfortran --help` gave "[Errno 2] No such file or directory: 'nvfortran'"
      Running `nvfortran --version` gave "[Errno 2] No such file or directory: 'nvfortran'"
      Running `nvfortran -V` gave "[Errno 2] No such file or directory: 'nvfortran'"
      Running `pgfortran --help` gave "[Errno 2] No such file or directory: 'pgfortran'"
      Running `pgfortran --version` gave "[Errno 2] No such file or directory: 'pgfortran'"
      Running `pgfortran -V` gave "[Errno 2] No such file or directory: 'pgfortran'"
      Running `ifort --help` gave "[Errno 2] No such file or directory: 'ifort'"
      Running `ifort --version` gave "[Errno 2] No such file or directory: 'ifort'"
      Running `ifort -V` gave "[Errno 2] No such file or directory: 'ifort'"
      Running `ifx --help` gave "[Errno 2] No such file or directory: 'ifx'"
      Running `ifx --version` gave "[Errno 2] No such file or directory: 'ifx'"
      Running `ifx -V` gave "[Errno 2] No such file or directory: 'ifx'"
      Running `g95 --help` gave "[Errno 2] No such file or directory: 'g95'"
      Running `g95 --version` gave "[Errno 2] No such file or directory: 'g95'"
      Running `g95 -V` gave "[Errno 2] No such file or directory: 'g95'"
      
      A full log can be found at /tmp/pip-install-n3kgfvbu/scipy_e1d37c3c9de044b599e85829ccf6d7d1/.mesonpy-dftr8p55/meson-logs/meson-log.txt
      [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.
╰─> scipy

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.
2026-08-05 01:09:30
google-cloud-build 3.38.1 Failed
  error: subprocess-exited-with-error
  
  × installing build dependencies for cryptography did not run successfully.
  │ exit code: 1
  ╰─> [38 lines of output]
      Ignoring cffi: markers 'python_version >= "3.15" and platform_python_implementation != "PyPy"' don't match your environment
      Collecting maturin<2,>=1.14.1
        Using cached maturin-1.14.1-py3-none-manylinux_2_12_x86_64.manylinux2010_x86_64.musllinux_1_1_x86_64.whl.metadata (16 kB)
      Collecting cffi>=2.0.0
        Using cached cffi-2.1.1.tar.gz (530 kB)
        Installing build dependencies: started
        Installing build dependencies: finished with status 'done'
        Getting requirements to build wheel: started
        Getting requirements to build wheel: finished with status 'error'
        error: subprocess-exited-with-error
      
        × Getting requirements to build wheel did not run successfully.
        │ exit code: 1
        ╰─> [20 lines of output]
            Traceback (most recent call last):
              File "/tmp/tmpuge4t_g7/venv/lib/python3.13t/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 389, in <module>
                main()
                ~~~~^^
              File "/tmp/tmpuge4t_g7/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/tmpuge4t_g7/venv/lib/python3.13t/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 143, in get_requires_for_build_wheel
                return hook(config_settings)
              File "/tmp/pip-build-env-_vh9d5_a/overlay/lib/python3.13t/site-packages/setuptools/build_meta.py", line 333, in get_requires_for_build_wheel
                return self._get_build_requires(config_settings, requirements=[])
                       ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
              File "/tmp/pip-build-env-_vh9d5_a/overlay/lib/python3.13t/site-packages/setuptools/build_meta.py", line 301, in _get_build_requires
                self.run_setup()
                ~~~~~~~~~~~~~~^^
              File "/tmp/pip-build-env-_vh9d5_a/overlay/lib/python3.13t/site-packages/setuptools/build_meta.py", line 317, in run_setup
                exec(code, locals())
                ~~~~^^^^^^^^^^^^^^^^
              File "<string>", line 22, in <module>
            RuntimeError: CFFI does not support the free-threaded build of CPython 3.13. Upgrade to free-threaded 3.14 or newer to use CFFI with the free-threaded build.
            [end of output]
      
        note: This error originates from a subprocess, and is likely not a problem with pip.
      ERROR: Failed to build 'cffi' when getting requirements to build wheel
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
ERROR: Failed to build 'cryptography' when installing build dependencies for cryptography
2026-08-07 01:03:06
google-cloud-dataflow-client 0.14.0 Failed
  error: subprocess-exited-with-error
  
  × installing build dependencies for cryptography did not run successfully.
  │ exit code: 1
  ╰─> [37 lines of output]
      Collecting maturin!=1.12.0,<2,>=1.9.4
        Using cached maturin-1.13.3-py3-none-manylinux_2_12_x86_64.manylinux2010_x86_64.musllinux_1_1_x86_64.whl.metadata (16 kB)
      Collecting cffi>=2.0.0
        Using cached cffi-2.0.0.tar.gz (523 kB)
        Installing build dependencies: started
        Installing build dependencies: finished with status 'done'
        Getting requirements to build wheel: started
        Getting requirements to build wheel: finished with status 'error'
        error: subprocess-exited-with-error
      
        × Getting requirements to build wheel did not run successfully.
        │ exit code: 1
        ╰─> [20 lines of output]
            Traceback (most recent call last):
              File "/tmp/tmpfmblwc6l/venv/lib/python3.13t/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 389, in <module>
                main()
                ~~~~^^
              File "/tmp/tmpfmblwc6l/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/tmpfmblwc6l/venv/lib/python3.13t/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 143, in get_requires_for_build_wheel
                return hook(config_settings)
              File "/tmp/pip-build-env-wosmraq6/overlay/lib/python3.13t/site-packages/setuptools/build_meta.py", line 333, in get_requires_for_build_wheel
                return self._get_build_requires(config_settings, requirements=[])
                       ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
              File "/tmp/pip-build-env-wosmraq6/overlay/lib/python3.13t/site-packages/setuptools/build_meta.py", line 301, in _get_build_requires
                self.run_setup()
                ~~~~~~~~~~~~~~^^
              File "/tmp/pip-build-env-wosmraq6/overlay/lib/python3.13t/site-packages/setuptools/build_meta.py", line 317, in run_setup
                exec(code, locals())
                ~~~~^^^^^^^^^^^^^^^^
              File "<string>", line 22, in <module>
            RuntimeError: CFFI does not support the free-threaded build of CPython 3.13. Upgrade to free-threaded 3.14 or newer to use CFFI with the free-threaded build.
            [end of output]
      
        note: This error originates from a subprocess, and is likely not a problem with pip.
      ERROR: Failed to build 'cffi' when getting requirements to build wheel
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
ERROR: Failed to build 'cryptography' when installing build dependencies for cryptography
2026-06-04 01:05:52
inflection 0.5.1 Success - 2025-05-20 17:53:26
dacite 1.9.2 Success - 2025-05-21 01:22:05
pipdeptree 4.2.0 Failed
  error: subprocess-exited-with-error
  
  × Preparing metadata (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> [42 lines of output]
      + meson setup /tmp/pip-install-1_rock2e/pipdeptree_56ed40aa48af4fff971a2a2e3e79f035 /tmp/pip-install-1_rock2e/pipdeptree_56ed40aa48af4fff971a2a2e3e79f035/.mesonpy-8hgewm21 -Dbuildtype=release -Db_ndebug=if-release -Db_vscrt=md --native-file=/tmp/pip-install-1_rock2e/pipdeptree_56ed40aa48af4fff971a2a2e3e79f035/.mesonpy-8hgewm21/meson-python-native-file.ini
      The Meson build system
      Version: 1.11.2
      Source dir: /tmp/pip-install-1_rock2e/pipdeptree_56ed40aa48af4fff971a2a2e3e79f035
      Build dir: /tmp/pip-install-1_rock2e/pipdeptree_56ed40aa48af4fff971a2a2e3e79f035/.mesonpy-8hgewm21
      Build type: native build
      Project name: pipdeptree
      Project version: 4.2.0
      Host machine cpu family: x86_64
      Host machine cpu: x86_64
      Program python found: YES (/tmp/tmpxr_itgyh/venv/bin/python)
      Program cargo found: YES (/usr/bin/cargo)
      Build targets in project: 1
      
      pipdeptree 4.2.0
      
        User defined options
          Native files: /tmp/pip-install-1_rock2e/pipdeptree_56ed40aa48af4fff971a2a2e3e79f035/.mesonpy-8hgewm21/meson-python-native-file.ini
          b_ndebug    : if-release
          b_vscrt     : md
          buildtype   : release
      
      Found ninja-1.13.0.git.kitware.jobserver-pipe-1 at /tmp/pip-build-env-jjqrdxte/overlay/bin/ninja
      + /tmp/pip-build-env-jjqrdxte/overlay/bin/ninja
      [1/1] Generating rust-extension with a custom command
      FAILED: [code=1] _rust.cpython-313t-x86_64-linux-gnu.so
      /tmp/tmpxr_itgyh/venv/bin/python ../tools/build_rust.py /usr/bin/cargo /tmp/pip-install-1_rock2e/pipdeptree_56ed40aa48af4fff971a2a2e3e79f035 _rust.cpython-313t-x86_64-linux-gnu.so lib_pipdeptree.so extension-module _rust.cpython-313t-x86_64-linux-gnu.so.d 4.2.0
      error: failed to parse manifest at `/tmp/pip-install-1_rock2e/pipdeptree_56ed40aa48af4fff971a2a2e3e79f035/Cargo.toml`
      
      Caused by:
        failed to parse the `edition` key
      
      Caused by:
        this version of Cargo is older than the `2024` edition, and only supports `2015`, `2018`, and `2021` editions.
      Traceback (most recent call last):
        File "/tmp/pip-install-1_rock2e/pipdeptree_56ed40aa48af4fff971a2a2e3e79f035/.mesonpy-8hgewm21/../tools/build_rust.py", line 54, in <module>
          main()
          ~~~~^^
        File "/tmp/pip-install-1_rock2e/pipdeptree_56ed40aa48af4fff971a2a2e3e79f035/.mesonpy-8hgewm21/../tools/build_rust.py", line 32, in main
          raise RuntimeError(msg)
      RuntimeError: Cargo exited with status 101
      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.
╰─> pipdeptree

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.
2026-08-01 01:02:33
jsonpickle 4.1.2 Success - 2026-05-29 01:01:29
appdirs 1.4.4 Success - 2025-05-20 19:35:15
resolvelib 1.2.1 Success - 2025-05-21 01:36:10
ddtrace 4.12.2 Failed
  error: subprocess-exited-with-error
  
  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [4 lines of output]
      <string>:32: DeprecationWarning: dep_util is Deprecated. Use functions from setuptools instead.
      INFO: DD_FAST_BUILD not enabled
      rustc version 1.87.0 or later required, 1.63.0
       found
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
ERROR: Failed to build 'ddtrace' when getting requirements to build wheel
2026-07-31 01:03:11
widgetsnbextension 4.0.15 Success - 2025-11-02 01:01:45
hdfs 2.7.3 Success - 2025-05-21 00:16:51

Python 3.14t Compatibility Results

Library Version Build Result Error Details Last Updated At
sphinx-rtd-theme 3.1.0 Success - 2026-01-13 01:02:08
tf-keras-nightly 2.21.0.dev2026080809 Failed
ERROR: Could not find a version that satisfies the requirement tf-nightly~=2.21.0.dev (from tf-keras-nightly) (from versions: none)
ERROR: No matching distribution found for tf-nightly~=2.21.0.dev
2026-08-09 01:34:09
hypothesis 6.165.2 Success - 2026-08-06 01:02:32
flask-login 0.6.3 Success - 2025-05-20 21:48:54
cachelib 0.15.4 Success - 2026-08-09 01:02:39
azure-keyvault-secrets 4.11.0 Success - 2026-04-17 01:02:36
langcodes 3.5.1 Success - 2025-12-03 01:43:42
uc-micro-py 2.0.0 Success - 2026-03-02 01:03:12
xgboost 3.4.0 Success - 2026-08-05 01:03:48
google-cloud-build 3.38.1 Success - 2026-08-07 01:42:50
google-cloud-dataflow-client 0.14.0 Success - 2026-06-04 01:33:45
inflection 0.5.1 Success - 2025-05-20 17:46:43
dacite 1.9.2 Success - 2025-05-20 23:03:10
pipdeptree 4.2.0 Success - 2026-08-01 01:02:28
jsonpickle 4.1.2 Success - 2026-05-29 01:01:29
appdirs 1.4.4 Success - 2025-05-20 21:43:42
resolvelib 1.2.1 Success - 2025-05-21 03:25:42
ddtrace 4.12.2 Failed
  error: subprocess-exited-with-error
  
  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [4 lines of output]
      <string>:32: DeprecationWarning: dep_util is Deprecated. Use functions from setuptools instead.
      INFO: DD_FAST_BUILD not enabled
      rustc version 1.87.0 or later required, 1.63.0
       found
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
ERROR: Failed to build 'ddtrace' when getting requirements to build wheel
2026-07-31 01:03:07
widgetsnbextension 4.0.15 Success - 2025-11-02 01:01:52
hdfs 2.7.3 Success - 2025-05-21 02:19:31