mkvtoolnix 79.0 -> 80.0 https://repology.org/project/mkvtoolnix/versions
attrpath: mkvtoolnix
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There might already be an open PR for this update:
- mkvtoolnix: 79.0 -> 80.0
  URL "https://api.github.com/repos/NixOS/nixpkgs/issues/264595"