haskellPackages.3d-graphics-example: fix the eval

[trofi]

Without the change the eval fails as:

$ nix build --no-link -f. haskellPackages.3d-graphics-example
error:
   … while evaluating the attribute 'value'
     at pkgs/development/haskell-modul
     2162|         name = old;
     2163|         value =
         |         ^
     2164|           lib.warnOnInstantiate "haskell.packages.*.${old} has b

   … in the right operand of the update (//) operator
     at lib/derivations.nix:253:12:
      252|     in
      253|     drv // mapAttrs (_: lib.warn msg) drvToWrap;
         |            ^
      254| }

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

   error: attribute '_3d-graphics-example' missing
   at pkgs/development/haskell-modules/configuration-nix.nix:2165:13:
     2164|           lib.warnOnInstantiate "haskell.packages.*.${old} has been renamed to haskell.packages.*.${new}"
     2165|             self.${new};
         |             ^
     2166|       }
   Did you mean one of 3d-graphics-example or _3d-graphics-examples?

Things done

• Built on platform:
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• Tested, as applicable:
  • NixOS tests in nixos/tests.
  • Package tests at passthru.tests.
  • Tests in lib/tests or pkgs/test for functions and "core" functionality.
• Ran nixpkgs-review on this PR. See nixpkgs-review usage.
• Tested basic functionality of all binary files, usually in ./result/bin/.
• Nixpkgs Release Notes
  • Package update: when the change is major or breaking.
• NixOS Release Notes
  • Module addition: when adding a new NixOS module.
  • Module update: when the change is significant.
• Fits CONTRIBUTING.md, pkgs/README.md, maintainers/README.md and other READMEs.

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[wolfgangwalther]

Thank you!

[nixpkgs-ci]

Successfully created backport PR for staging-25.11:

• [Backport staging-25.11] haskellPackages.3d-graphics-example: fix the eval #466529