1these 4 derivations will be built:2 /nix/store/4jfc1bv3l49nc6v46q0xhr0qdfzvx6zd-source.drv3 /nix/store/wjb5qp3xi6fdldbrw8yq7jzrvjwrq5mb-ruamel.yaml-0.17.40.tar.gz.drv4 /nix/store/f3hghmy16lr33y07mpsx3ibfn5znjs0x-python3.14-ruamel-yaml-0.17.40.drv5 /nix/store/bp5aizkvsqvfhv05bfci23rwcw24ca6a-python3.14-evcouplings-0.2.1.drv6these 21 paths will be fetched (96.5 MiB download, 391.0 MiB unpacked):7 /nix/store/k6ifbhycbdw090cznyjbr4x8bx6n9mmg-hmmer-3.48 /nix/store/3x8bz7cibhc4ja6vw61y2vv02wzn98as-python3.14-billiard-4.2.49 /nix/store/jpmqxyqxm63mk8n01r6pr6dd6rx4kpsb-python3.14-bokeh-3.8.210 /nix/store/0f3q62z8skrgjajs61l5cpdbl6nf9yv4-python3.14-contourpy-1.3.311 /nix/store/nnm72ill7c3fpddy3hrjv7k3qrqj2gh8-python3.14-cycler-0.12.112 /nix/store/hq849c12xz5syydllyc12pq1hvjgz7m7-python3.14-editables-0.613 /nix/store/4hhwxqfxm98k9a5swnrwin3vcml5i240-python3.14-fonttools-4.63.014 /nix/store/9n7cyaybs0kd9dh60zbns1r6yfgmvjk4-python3.14-hatchling-1.31.015 /nix/store/jpa8mqb0gcr40by7nki83q9jvip81hqj-python3.14-kiwisolver-1.5.016 /nix/store/cwclqlksb4s39i8i9lxv0fc0a9zm77q7-python3.14-llvmlite-0.48.017 /nix/store/6qnj5jn8qlngl5bdsldh681kdgjvl194-python3.14-matplotlib-3.11.018 /nix/store/hxs2am036436ljr5md9bdlvi7ijg5z4i-python3.14-narwhals-2.23.019 /nix/store/a32z5pgwp05cbpzlhwhdsvas26b36p3f-python3.14-numba-0.66.020 /nix/store/sv4136918wfxkl6ywi1lzk94kxfdvd7r-python3.14-pyparsing-3.3.221 /nix/store/z0ssi9nclpnp7pdvzaypf82wf6kgjc6x-python3.14-scikit-learn-1.8.022 /nix/store/x99r36m3r3ns176xlpkf0fhf3fg5v0vl-python3.14-seaborn-0.13.223 /nix/store/6znz1h6akqb3w403ifz7f3x6jwz7ryap-python3.14-threadpoolctl-3.6.024 /nix/store/k9mfn5hf517rhajxfrnb2rzzrcfpffqw-python3.14-tkinter-3.14.625 /nix/store/al1c1zww20z2gk0szy9znjjxwn1dva0r-python3.14-tornado-6.5.726 /nix/store/4fdn0i5rbk45k54bibnd2qdbp9pgw6pa-python3.14-trove-classifiers-2026.6.1.1927 /nix/store/v0b7x96yb07r7mqv7yz9xfqp41nrpilf-python3.14-xyzservices-2026.3.028error: Cannot build '/nix/store/f3hghmy16lr33y07mpsx3ibfn5znjs0x-python3.14-ruamel-yaml-0.17.40.drv'.29 Reason: builder failed with exit code 1.30 Output paths:31 /nix/store/7pjrrks468ymbh1bkws4d80mv4xp58j8-python3.14-ruamel-yaml-0.17.40-dist32 /nix/store/ljac8w9mlnfvszza14k1x2vbizv6i082-python3.14-ruamel-yaml-0.17.4033 Last 25 log lines:34 > pypa build flags: --no-isolation --outdir dist/ --wheel35 > * Getting build dependencies for wheel...36 > Traceback (most recent call last):37 > 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>38 > main()39 > ~~~~^^40 > 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 main41 > json_out["return_val"] = hook(**hook_input["kwargs"])42 > ~~~~^^^^^^^^^^^^^^^^^^^^^^^^43 > 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_wheel44 > return hook(config_settings)45 > 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_wheel46 > return self._get_build_requires(config_settings, requirements=[])47 > ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^48 > File "/nix/store/xv8alksljvbyk0mrbf9xvl16ygx27ajn-python3.14-setuptools-83.0.0/lib/python3.14/site-packages/setuptools/build_meta.py", line 301, in _get_build_requires49 > self.run_setup()50 > ~~~~~~~~~~~~~~^^51 > File "/nix/store/xv8alksljvbyk0mrbf9xvl16ygx27ajn-python3.14-setuptools-83.0.0/lib/python3.14/site-packages/setuptools/build_meta.py", line 317, in run_setup52 > exec(code, locals())53 > ~~~~^^^^^^^^^^^^^^^^54 > File "<string>", line 79, in <module>55 > ImportError: cannot import name 'Str' from 'ast' (/nix/store/rgnappqqc5vbq60gza5fflyk84sylwl6-python3-3.14.6/lib/python3.14/ast.py)56 >57 > 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 build58 > ERROR Backend subprocess exited when trying to invoke get_requires_for_build_wheel59 For full logs, run:60 nix log /nix/store/f3hghmy16lr33y07mpsx3ibfn5znjs0x-python3.14-ruamel-yaml-0.17.40.drv61error: Cannot build '/nix/store/bp5aizkvsqvfhv05bfci23rwcw24ca6a-python3.14-evcouplings-0.2.1.drv'.62 Reason: 1 dependency failed.63 Output paths:64 /nix/store/596if06wskgj9j5b9i0mpj16wnxsiwl3-python3.14-evcouplings-0.2.1-dist65 /nix/store/gcppsg7xzaf4g8gzs4v548nmdw6d5byl-python3.14-evcouplings-0.2.1