There's a merged pull request on the void-packages repository

common/shlibs: mutter: add versioned soname to shlibs
https://github.com/void-linux/void-packages/pull/19100

Description:
- mutter generates shared-object with both API version, and SONAME
  version.
- We declared unversioned SONAME (with API version in template)
- gnome-shell requires versioned SONAME when packaging.

- Fix this problem by adding both versioned and unversioned SONAME to
  shlibs list

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As in current state, gnome-shell is failed to be packaged