dbus-python: fix configure dependency on python3

[dadada]

Motivation for this change

Fixes #148195

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• 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
• 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/)
• 22.05 Release Notes (or backporting 21.11 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
  • (Release notes changes) Ran nixos/doc/manual/md-to-db.sh to update generated release notes
• Fits CONTRIBUTING.md.

[Artturin]

needs to target staging

# finding the common merge base will avoid pinging all CODEOWNERs
common=$(git merge-base origin/master origin/staging)
git rebase --onto=$common HEAD~1 # or however many commits you want to pull
git push --force

then change the base branch in the github PR from master -> staging

[jtojnar]

Thanks, though note that Python 2 support will be removed in the next version.

[paperdigits]

Can this be backported to 21.11 as well, please?

[dadada]

Thanks, though note that Python 2 support will be removed in the next version.

Will 21.11 be updated with the next (minor) release of dbus-python? If yes, I'd be in favor of not patching this here.

[jtojnar]

I do not think 21.11 will upgrade, it would clearly be a breaking change (especially when we backport this).

[jtojnar]

@GrahamcOfBorg eval

[github-actions]

Successfully created backport PR #148660 for staging-21.11.