Build failure: mkvtoolnix

[IncredibleLaser]

Nixpkgs version

• Unstable (26.11)

Steps to reproduce

Build mkvtoolnix or mkvtoolnix-cli from current nixos-unstable-small

Can Hydra reproduce this build failure?

Yes, Hydra can reproduce this build failure.

Link to Hydra build job

https://hydra.nixos.org/build/337295403

Relevant log output

...
          LINK src/tools/hevcc_dump
           CXX src/tools/pgs_dump.cpp
          LINK src/tools/pgs_dump
           CXX src/tools/vc1parser.cpp
          LINK src/tools/vc1parser
           CXX src/tools/xyzvc_dump.cpp
          LINK src/tools/xyzvc_dump
rake aborted!
Don't know how to build task 'tests/unit/gui/gui' (See the list of available tasks with `rake --tasks`)
Did you mean?  tests/unit/merge/merge

Tasks: TOP => tests:unit
(See full trace by running task with --trace)

Additional context

The package is currently only in nixos-unstable-small.

System metadata

fetching path input 'path:/nix/store/ifpab9hxqmk2biwy594da8ipxzsp3y4s-source'
 - system: `"x86_64-linux"`
 - host os: `Linux 7.1.3-cachyos, NixOS, 26.11 (Zokor), 26.11.20260705.d407951`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Lix, like Nix) 2.95.2
System type: x86_64-linux
Additional system types: aarch64-linux, i686-linux
Features: gc, signed-caches
System configuration file: /etc/nix/nix.conf
User configuration files: /home/laser/.config/nix/nix.conf:/nix/store/s2w5s3i0qg8f85g6c8rh69c0pl77b7pm-plasma-workspace-6.7.2/etc/xdg/nix/nix.conf:/nix/store/6cb3zjnwz0v3dz0cxralv4ym8y9al7hd-kglobalacceld-6.7.2/etc/xdg/nix/nix.conf:/nix/store/vah0fry2dsj8n2ai17ig7lb90xkw4sk5-baloo-6.27.0/etc/xdg/nix/nix.conf:/home/laser/.config/kdedefaults/nix/nix.conf:/home/laser/.config/kdedefaults/nix/nix.conf:/etc/xdg/nix/nix.conf:/home/laser/.local/share/flatpak/exports/etc/xdg/nix/nix.conf:/var/lib/flatpak/exports/etc/xdg/nix/nix.conf:/home/laser/.nix-profile/etc/xdg/nix/nix.conf:/nix/profile/etc/xdg/nix/nix.conf:/home/laser/.local/state/nix/profile/etc/xdg/nix/nix.conf:/etc/profiles/per-user/laser/etc/xdg/nix/nix.conf:/nix/var/nix/profiles/default/etc/xdg/nix/nix.conf:/run/current-system/sw/etc/xdg/nix/nix.conf
Store directory: /nix/store
State directory: /nix/var/nix
Data directory: /nix/store/vjdi2nfyh74xnych9c6hk51il4jch2c6-lix-2.95.2/share`
 - channels(root): `""`
 - nixpkgs: `/nix/store/ifpab9hxqmk2biwy594da8ipxzsp3y4s-source`

Notify maintainers

@rnhmjoj

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[vikrtd]

@rnhmjoj It looks like #539667 broke mkvtoolnix-cli

[rnhmjoj]

Right, it seems it tries to build some GUI tests when the GUI is disabled.
I'm trying to see if there's an easy fix, otherwise I'll revert the update for now.