libxkbcommon

• Uses a custom license expression LicenseRef-digital-equipment-corporation
• Releases have migrated to github from xkbcommon.org
• xkbregistry depends on libxml2; latest versions of libxkbcommon (as of 1.8.1) now require at least version 2.14.0 of libxml2
• libxkbcommon removed support for byacc as of 1.10.0 and are recommending bison>=3.6 instead

References

• https://github.com/glaucuslinux/core/issues/9
• https://github.com/xkbcommon/libxkbcommon/issues/644
• https://github.com/xkbcommon/libxkbcommon/pull/633