Build failure: python313Packages.ansible

[offby0point5]

Nixpkgs version

• Unstable (25.05)

Steps to reproduce

Anything evaluating python313Packages.ansible and some related packages will fail.
You could test this: nix shell nixpkgs#python313Packages.ansible

Hydra cannot not evaluate it either.

Can Hydra reproduce this build failure?

Yes, Hydra can reproduce this build failure.

Link to Hydra build job

https://hydra.nixos.org/jobset/nixpkgs/trunk#tabs-errors

Relevant log output

in job ‘python313Packages.ansible.x86_64-linux’:
error:
       … while calling the 'deepSeq' builtin
         at /nix/store/shh5sdqk4h0s482fxyyw6v5hhljapby9-source/lib/customisation.nix:479:35:
          478|     in
          479|     if drv == null then null else deepSeq drv' drv';
             |                                   ^
          480|

       … while evaluating the attribute 'outPath'
         at /nix/store/shh5sdqk4h0s482fxyyw6v5hhljapby9-source/lib/customisation.nix:468:13:
          467|           value = commonAttrs // {
          468|             outPath = output.outPath;
             |             ^
          469|             drvPath = output.drvPath;

       (stack trace truncated; use '--show-trace' to show the full, detailed trace)

       error: future-1.0.0 not supported for interpreter python3.13

Additional context

It seems that Python 3.13 no longer supports many of the Python 2/3 compatibility features that are used by the future package. That's why it cannot be built on this Python version. This issue was linked in the nixpkgs.

System metadata

• system: "x86_64-linux"
• host os: Linux 6.12.17, NixOS, 25.05 (Warbler), 25.05.20250305.d69ab0d
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.24.12
• nixpkgs: /nix/store/b19xi89pgm1arig3l9xqn1h81zjd1j91-source

Notify maintainers

---

Note for maintainers: Please tag this issue in your pull request description. (i.e. Resolves #ISSUE.)

I assert that this issue is relevant for Nixpkgs

• I assert that this is a bug and not a support request.
• I assert that this is not a duplicate of an existing issue.
• I assert that I have read the NixOS Code of Conduct and agree to abide by it.

Is this issue important to you?

Add a 👍 reaction to issues you find important.