Build failure: python3Packages.pypdfium2

[sarahec]

Nixpkgs version

• Unstable (25.05)

Steps to reproduce

❯ hydra-check python312Packages.pypdfium2
Build Status for nixpkgs.python312Packages.pypdfium2.x86_64-linux on jobset nixos/trunk-combined
https://hydra.nixos.org/job/nixos/trunk-combined/nixpkgs.python312Packages.pypdfium2.x86_64-linux
✖ (Dependency failed)  python3.12-pypdfium2-4.30.1  2025-01-29  https://hydra.nixos.org/build/287220104
❯ nix-build -A python312Packages.pypdfium2
these 4 derivations will be built:
  /nix/store/3fmxn0ja02qlzglmlmbdllhgizq5ca80-public.tar.gz.drv
  /nix/store/njrxm67l0js9nv205zzh51nw5n8nnyl3-python3.12-ctypesgen-1.1.1+g848e9fbb1374f7f58a7ebf5e5da5c33292480b30.drv
  /nix/store/zdjpjzy7fiqnkvsjz8bci7dl2hr0y86a-version.json.drv
  /nix/store/nj61w6cn7lqhqfxb2gzs7xi5cylvfgbi-python3.12-pypdfium2-4.30.1.drv
...elided...
error: hash mismatch in fixed-output derivation '/nix/store/3fmxn0ja02qlzglmlmbdllhgizq5ca80-public.tar.gz.drv':
         specified: sha256-vKfs4Jd8LEtA3aTI+DcJMS0VOErq1IR1eThnMlxiER0=
            got:    sha256-+VD0nq5B2W/oss+lPRZWiRDPpnQ+QhkKv3nlh1lDfD8=
error: 1 dependencies of derivation '/nix/store/nj61w6cn7lqhqfxb2gzs7xi5cylvfgbi-python3.12-pypdfium2-4.30.1.drv' failed to build

Can Hydra reproduce this build failure?

Yes, Hydra can reproduce this build failure.

Link to Hydra build job

https://hydra.nixos.org/build/287220104

Relevant log output

Running phase: fixupPhase
shrinking RPATHs of ELF executables and libraries in /nix/store/zfa2v089f2fjljpibmdv03as3gg6q3bj-python3.12-ctypesgen-1.1.1+g848e9fbb1374f7f58a7ebf5e5da5c33292480b30
checking for references to /build/ in /nix/store/zfa2v089f2fjljpibmdv03as3gg6q3bj-python3.12-ctypesgen-1.1.1+g848e9fbb1374f7f58a7ebf5e5da5c33292480b30...
patching script interpreter paths in /nix/store/zfa2v089f2fjljpibmdv03as3gg6q3bj-python3.12-ctypesgen-1.1.1+g848e9fbb1374f7f58a7ebf5e5da5c33292480b30
stripping (with command strip and flags -S -p) in  /nix/store/zfa2v089f2fjljpibmdv03as3gg6q3bj-python3.12-ctypesgen-1.1.1+g848e9fbb1374f7f58a7ebf5e5da5c33292480b30/lib /nix/store/zfa2v089f2fjljpibmdv03as3gg6q3bj-python3.12-ctypesgen-1.1.1+g848e9fbb1374f7f58a7ebf5e5da5c33292480b30/bin
shrinking RPATHs of ELF executables and libraries in /nix/store/5cgfkr2h33z6lb4ah12k75n5p6bv3fbr-python3.12-ctypesgen-1.1.1+g848e9fbb1374f7f58a7ebf5e5da5c33292480b30-dist
checking for references to /build/ in /nix/store/5cgfkr2h33z6lb4ah12k75n5p6bv3fbr-python3.12-ctypesgen-1.1.1+g848e9fbb1374f7f58a7ebf5e5da5c33292480b30-dist...
patching script interpreter paths in /nix/store/5cgfkr2h33z6lb4ah12k75n5p6bv3fbr-python3.12-ctypesgen-1.1.1+g848e9fbb1374f7f58a7ebf5e5da5c33292480b30-dist
Rewriting #!/nix/store/qrc496n6fsqp4p5m5h8wmw5d5jwyw5mr-python3-3.12.8/bin/python3.12 to #!/nix/store/qrc496n6fsqp4p5m5h8wmw5d5jwyw5mr-python3-3.12.8
wrapping `/nix/store/zfa2v089f2fjljpibmdv03as3gg6q3bj-python3.12-ctypesgen-1.1.1+g848e9fbb1374f7f58a7ebf5e5da5c33292480b30/bin/ctypesgen'...
Executing pythonRemoveTestsDir
Finished executing pythonRemoveTestsDir
Running phase: installCheckPhase
no Makefile or custom installCheckPhase, doing nothing
Running phase: pythonCatchConflictsPhase
100 73513    0 73513    0     0  90977      0 --:--:-- --:--:-- --:--:-- 90981
error: hash mismatch in fixed-output derivation '/nix/store/3fmxn0ja02qlzglmlmbdllhgizq5ca80-public.tar.gz.drv':
         specified: sha256-vKfs4Jd8LEtA3aTI+DcJMS0VOErq1IR1eThnMlxiER0=
            got:    sha256-+VD0nq5B2W/oss+lPRZWiRDPpnQ+QhkKv3nlh1lDfD8=
error: 1 dependencies of derivation '/nix/store/nj61w6cn7lqhqfxb2gzs7xi5cylvfgbi-python3.12-pypdfium2-4.30.1.drv' failed to build

Additional context

No response

System metadata

• system: "x86_64-linux"
• host os: Linux 6.12.11, NixOS, 25.05 (Warbler), 25.05.20250126.852ff1d
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.24.11
• channels(root): "nixos-23.05"
• channels(sec): ""
• nixpkgs: /nix/store/wshnc0kqk1qz7iffb1yqri8a5cy6v7w5-source

Notify maintainers

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[sarahec]

Root cause: the headers aren't being downloaded from a fixed commit. See #378156 (comment)