python3Packages: Fix and document the removal of the local `.overrideAttrs` attribute

[ShamrockLee]

This PR cleans up the leftover of #333670.

After #333670, buildPythonPackage and buildPythonApplication no longer apply lib.makeOverridable themselves and no longer provide .override and .overrideDerivation of the returning package.

For Python packages provided by Nixpkgs, the local .override attribute is almost always shadowed by the one provided by callPackage, and so does the .overrideDerivation attribute. I didn't find any use of the local override in Nixpkgs, but @trofi reported the evaluation failure of python3Packages.pythonCatchConflictsHook.tests.catches-conflict-multiple-chains due to the loss of the local overrideDerivation.

This PR uses lib.overrideDerivation instead of the overrideDerivation attribute to fix the evaluation of python3Packages.pythonCatchConflictsHook.tests.catches-conflict-multiple-chains and document the removal of the buildPython*-generated local overrideDerivation attribute in the release note.

Things done

• Built on platform(s)
  • [X] x86_64-linux
  • [ ] aarch64-linux
  • [ ] x86_64-darwin
  • [ ] aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • [ ] sandbox = relaxed
  • [ ] sandbox = true
• [X] Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• [x] Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• [ ] Tested basic functionality of all binary files (usually in ./result/bin/)
• 24.11 Release Notes (or backporting 23.11 and 24.05 Release notes)
  • [ ] (Package updates) Added a release notes entry if the change is major or breaking
  • [ ] (Module updates) Added a release notes entry if the change is significant
  • [ ] (Module addition) Added a release notes entry if adding a new NixOS module
• [x] Fits CONTRIBUTING.md.

---

Add a :+1: reaction to pull requests you find important.

[ShamrockLee]

nixpkgs-review result

Generated using nixpkgs-review.

Command: nixpkgs-review

---

x86_64-linux

:fast_forward: 1 package blacklisted:

• nixos-install-tools

[trofi]

The change fixes the eval failures for that attribute for me. Thank you!

But I'm afraid I found another eval failure:

$ nix-instantiate -A python3Packages.scikit-image.tests.all-tests
error: attribute 'override' missing
       at /tmp/z/nixpkgs/pkgs/development/python-modules/scikit-image/default.nix:160:19:
          159|     passthru.tests = {
          160|       all-tests = self.override { doCheck = true; };
             |                   ^
          161|     };

It bisects down to the same 58bfe741230877e32be930a581bd2f89980b40d5 buildPython*: Deprecate and remove (buildPython* { ... }).override. Worth fixing it as well?

[ShamrockLee]

@trofi I'll fix it as well.

Would you mind sharing how you found those evaluation errors in <pkg>.tests? The nixpkgs-review PR (Mic92/nixpkgs-review#397) to examine them hasn't been merged yet.

[trofi]

@trofi I'll fix it as well.

Would you mind sharing how you found those evaluation errors in <pkg>.tests? The nixpkgs-review PR (Mic92/nixpkgs-review#397) to examine them hasn't been merged yet.

I'm using this script: https://github.com/trofi/nixpkgs-overlays/blob/main/lib/all-attrs-iter.bash and run it as:

$ ./all-attrs-iter.bash -I nixpkgs=~/n --arg maxDepth 4 --arg verbose 3 --arg ignoreDrvAttrs false

~/n contains nixpkgs from staging branch. The caveat is that I have a bunch of patches against nixpkgs to skip other known eval failures.

[trofi]

Tested the attribute evaluation against the current branch state. All good now. Thank you!

[ShamrockLee]

@trofi, could you officially approve this PR using the GitHub Review? This would make the approval more visible.

[nixos-discourse]

This pull request has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/prs-already-reviewed/2617/2063

[ShamrockLee]

As the Nixpkgs 24.11 branch-off is made, this PR should be backported onto the release-24.11 branch once it is merged.

[ShamrockLee]

Cc: @natsukagami

[natsukagami]

@natsukium 👋

[ShamrockLee]

@natsukium 👋

Oops! Sorry for bothering and thank you for the redirection.

[github-actions[bot]]

Successfully created backport PR for release-24.11:

• #357196

[github-actions[bot]]

Git push to origin failed for release-24.11 with exitcode 1