these 2 derivations will be built:
  /nix/store/f3hghmy16lr33y07mpsx3ibfn5znjs0x-python3.14-ruamel-yaml-0.17.40.drv
  /nix/store/bp5aizkvsqvfhv05bfci23rwcw24ca6a-python3.14-evcouplings-0.2.1.drv
error: Cannot build '/nix/store/f3hghmy16lr33y07mpsx3ibfn5znjs0x-python3.14-ruamel-yaml-0.17.40.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/7pjrrks468ymbh1bkws4d80mv4xp58j8-python3.14-ruamel-yaml-0.17.40-dist
         /nix/store/ljac8w9mlnfvszza14k1x2vbizv6i082-python3.14-ruamel-yaml-0.17.40
       Last 25 log lines:
       > pypa build flags: --no-isolation --outdir dist/ --wheel
       > * Getting build dependencies for wheel...
       > Traceback (most recent call last):
       >   File "/nix/store/gxrvc2gq4kzz54dqi1mlqw7h4zy4l6aw-python3.14-pyproject-hooks-1.2.0/lib/python3.14/site-packages/pyproject_hooks/_in_process/_in_process.py", line 389, in <module>
       >     main()
       >     ~~~~^^
       >   File "/nix/store/gxrvc2gq4kzz54dqi1mlqw7h4zy4l6aw-python3.14-pyproject-hooks-1.2.0/lib/python3.14/site-packages/pyproject_hooks/_in_process/_in_process.py", line 373, in main
       >     json_out["return_val"] = hook(**hook_input["kwargs"])
       >                              ~~~~^^^^^^^^^^^^^^^^^^^^^^^^
       >   File "/nix/store/gxrvc2gq4kzz54dqi1mlqw7h4zy4l6aw-python3.14-pyproject-hooks-1.2.0/lib/python3.14/site-packages/pyproject_hooks/_in_process/_in_process.py", line 143, in get_requires_for_build_wheel
       >     return hook(config_settings)
       >   File "/nix/store/xv8alksljvbyk0mrbf9xvl16ygx27ajn-python3.14-setuptools-83.0.0/lib/python3.14/site-packages/setuptools/build_meta.py", line 333, in get_requires_for_build_wheel
       >     return self._get_build_requires(config_settings, requirements=[])
       >            ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
       >   File "/nix/store/xv8alksljvbyk0mrbf9xvl16ygx27ajn-python3.14-setuptools-83.0.0/lib/python3.14/site-packages/setuptools/build_meta.py", line 301, in _get_build_requires
       >     self.run_setup()
       >     ~~~~~~~~~~~~~~^^
       >   File "/nix/store/xv8alksljvbyk0mrbf9xvl16ygx27ajn-python3.14-setuptools-83.0.0/lib/python3.14/site-packages/setuptools/build_meta.py", line 317, in run_setup
       >     exec(code, locals())
       >     ~~~~^^^^^^^^^^^^^^^^
       >   File "<string>", line 79, in <module>
       > ImportError: cannot import name 'Str' from 'ast' (/nix/store/rgnappqqc5vbq60gza5fflyk84sylwl6-python3-3.14.6/lib/python3.14/ast.py)
       >
       > TIP pass --env-dir and --sdist-extract-dir to keep the build environment and sources, then see https://build.pypa.io/en/stable/how-to/troubleshooting.html#debug-a-failed-build for help debugging a failed build
       > ERROR Backend subprocess exited when trying to invoke get_requires_for_build_wheel
       For full logs, run:
         nix log /nix/store/f3hghmy16lr33y07mpsx3ibfn5znjs0x-python3.14-ruamel-yaml-0.17.40.drv
error: Cannot build '/nix/store/bp5aizkvsqvfhv05bfci23rwcw24ca6a-python3.14-evcouplings-0.2.1.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/596if06wskgj9j5b9i0mpj16wnxsiwl3-python3.14-evcouplings-0.2.1-dist
         /nix/store/gcppsg7xzaf4g8gzs4v548nmdw6d5byl-python3.14-evcouplings-0.2.1