xeus-cling: mark as broken on darwin

[GaetanLepage]

Things done

Running phase: fixupPhase
Running phase: installCheckPhase
Input Notebook:  /nix/store/071l88m8q3gv7ms7aprjzdcq46vcaf0m-test.ipynb
Output Notebook: out.ipynb
Executing:   0% 0/1 [00:00<?, ?cell/s]In file included from input_line_1:1:
In file included from /nix/store/gn4fq6cjy6pjxs8s8ccqnph5dw8q38hd-libcxx-13.0.1-dev/include/c++/v1/new:92:
In file included from /nix/store/gn4fq6cjy6pjxs8s8ccqnph5dw8q38hd-libcxx-13.0.1-dev/include/c++/v1/cstdlib:85:
/nix/store/gn4fq6cjy6pjxs8s8ccqnph5dw8q38hd-libcxx-13.0.1-dev/include/c++/v1/stdlib.h:93:15: fatal error: 'stdlib.h' file not found
#include_next <stdlib.h>
              ^~~~~~~~~~

• Built on platform(s)
  • 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
• 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/)
• 25.05 Release Notes (or backporting 24.11 and 25.05 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
• Fits CONTRIBUTING.md.

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[GaetanLepage]

nixpkgs-review result

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Command: nixpkgs-review pr 393026