gupnp-av: pkgsCross.aarch64-multiplatform.gupnp-av fails on x86_64-linux

[yvesf]

Nixpkgs version

• Stable (25.11)

Describe the bug

Cross compilation fails: nix build .#pkgsCross.aarch64-multiplatform.gupnp-av

       > Run-time dependency gi-docgen found: NO (tried pkgconfig and cmake)
       > Looking for a fallback subproject for the dependency gi-docgen
       > ERROR: Subproject gi-docgen is buildable: NO
       >
       > meson.build:110:15: ERROR: Automatic wrap-based subproject downloading is disabled

Steps to reproduce

nix build .#pkgsCross.aarch64-multiplatform.gupnp-av on x86_64

Expected behaviour

Package cross compiles cleanly.

Screenshots

No response

Relevant log output

Additional context

Workaround: add

  buildInputs = [ gi-docgen ];

System metadata

• system: "x86_64-linux"
• host os: Linux 6.12.80, NixOS, 25.11 (Xantusia), 25.11.20260410.54170c5
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.31.4
• nixpkgs: /nix/store/m5dr0w2wb9lca77ar3idab31szd6mix7-source

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