qt3: fix build after multiple-outputs change

[womfoo]

• Tested using sandboxing
  (nix.useChroot on NixOS,
  or option build-use-chroot in nix.conf
  on non-NixOS)
• Built on platform(s)
  • NixOS
  • OS X
  • Linux
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Fits CONTRIBUTING.md.

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nox-review identified 3 more dependencies (lprof, taskjuggler and twinkle) and I could make them compile successfully only when marking taskjuggler with broken = true.

Besides that, lprof and twinkle seem to work fine.

Let me know if we should mark taskjuggler as broken.

[mention-bot]

@womfoo, thanks for your PR! By analyzing the annotation information on this pull request, we identified @edolstra, @vcunat and @bluescreen303 to be potential reviewers

[FRidh]

Qt3? That's 12 years old. Is anyone still using applications that use Qt3?

[grahamc]

Looks like these are the only ones in nixpkgs:

• https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/networking/instant-messengers/twinkle/default.nix
• https://github.com/NixOS/nixpkgs/blob/master/pkgs/tools/graphics/lprof/default.nix (has no update)
• https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/misc/taskjuggler/default.nix (has an update, not sure if it is still using qt3.)

Reference: http://search.nix.gsc.io/?q=qt3

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Review status: 0 of 1 files reviewed at latest revision, all discussions resolved, some commit checks failed.

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Comments from Reviewable

[womfoo]

Personally, I don't use any qt3-based apps. I just stumbled upon the build failure when poking around hydra and thought it would be interesting to fix. ;-)

I'm alright closing this PR if there isn't any demand for the apps.

ccing maintainers @markweber (lprof and twinkle) and @nbp (taskjuggler)