these 4 derivations will be built:
  /nix/store/4jfc1bv3l49nc6v46q0xhr0qdfzvx6zd-source.drv
  /nix/store/wjb5qp3xi6fdldbrw8yq7jzrvjwrq5mb-ruamel.yaml-0.17.40.tar.gz.drv
  /nix/store/f3hghmy16lr33y07mpsx3ibfn5znjs0x-python3.14-ruamel-yaml-0.17.40.drv
  /nix/store/bp5aizkvsqvfhv05bfci23rwcw24ca6a-python3.14-evcouplings-0.2.1.drv
these 32 paths will be fetched (137.6 MiB download, 502.9 MiB unpacked):
  /nix/store/3vh3kdh7551im7kjn9jdgx6d076gw1s0-hh-suite-3.3.0
  /nix/store/k6ifbhycbdw090cznyjbr4x8bx6n9mmg-hmmer-3.4
  /nix/store/wi4j8y3snsxpx2aj37jajywl19p9ri2h-libimagequant-4.4.1
  /nix/store/n0rv518rf637hqhmi6zmpzypv9sh7qjy-libraqm-0.10.5
  /nix/store/a5v38gkzvmcmzd3f60mpycwsd5xlna41-openjpeg-2.5.4
  /nix/store/3x8bz7cibhc4ja6vw61y2vv02wzn98as-python3.14-billiard-4.2.4
  /nix/store/jpmqxyqxm63mk8n01r6pr6dd6rx4kpsb-python3.14-bokeh-3.8.2
  /nix/store/0f3q62z8skrgjajs61l5cpdbl6nf9yv4-python3.14-contourpy-1.3.3
  /nix/store/nnm72ill7c3fpddy3hrjv7k3qrqj2gh8-python3.14-cycler-0.12.1
  /nix/store/hq849c12xz5syydllyc12pq1hvjgz7m7-python3.14-editables-0.6
  /nix/store/4hhwxqfxm98k9a5swnrwin3vcml5i240-python3.14-fonttools-4.63.0
  /nix/store/9n7cyaybs0kd9dh60zbns1r6yfgmvjk4-python3.14-hatchling-1.31.0
  /nix/store/8i5dbk8zzyfq2md13f4j34rwpf71g9r3-python3.14-joblib-1.5.3
  /nix/store/jpa8mqb0gcr40by7nki83q9jvip81hqj-python3.14-kiwisolver-1.5.0
  /nix/store/cwclqlksb4s39i8i9lxv0fc0a9zm77q7-python3.14-llvmlite-0.48.0
  /nix/store/9wq6hbyc3jhx3ckm7qdazfzk26b4hyvv-python3.14-lz4-4.4.5
  /nix/store/6qnj5jn8qlngl5bdsldh681kdgjvl194-python3.14-matplotlib-3.11.0
  /nix/store/hxs2am036436ljr5md9bdlvi7ijg5z4i-python3.14-narwhals-2.23.0
  /nix/store/a32z5pgwp05cbpzlhwhdsvas26b36p3f-python3.14-numba-0.66.0
  /nix/store/s9d7ipjpsxg4am6h4f81bl7l2w3xz9rh-python3.14-pathspec-1.1.1
  /nix/store/d34xwc75k6wvlvgh65qppicskd080r3w-python3.14-pillow-12.3.0
  /nix/store/yjkkmvmag4hrqm4hwkmfkl3hv7s03ibv-python3.14-pluggy-1.6.0
  /nix/store/sv4136918wfxkl6ywi1lzk94kxfdvd7r-python3.14-pyparsing-3.3.2
  /nix/store/fl0j3dzp9h96qq3cw4x77yy99d2zppi0-python3.14-ruamel-base-1.0.0
  /nix/store/9cyz6bk8w53n4j53ka92v7svgb3ykhyw-python3.14-ruamel-yaml-clib-0.2.15
  /nix/store/z0ssi9nclpnp7pdvzaypf82wf6kgjc6x-python3.14-scikit-learn-1.8.0
  /nix/store/x99r36m3r3ns176xlpkf0fhf3fg5v0vl-python3.14-seaborn-0.13.2
  /nix/store/6znz1h6akqb3w403ifz7f3x6jwz7ryap-python3.14-threadpoolctl-3.6.0
  /nix/store/k9mfn5hf517rhajxfrnb2rzzrcfpffqw-python3.14-tkinter-3.14.6
  /nix/store/al1c1zww20z2gk0szy9znjjxwn1dva0r-python3.14-tornado-6.5.7
  /nix/store/4fdn0i5rbk45k54bibnd2qdbp9pgw6pa-python3.14-trove-classifiers-2026.6.1.19
  /nix/store/v0b7x96yb07r7mqv7yz9xfqp41nrpilf-python3.14-xyzservices-2026.3.0
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