There is an updated pull request by paper42 against master on the void-packages repository

https://github.com/paper42/void-packages polari-no-mozjs78
https://github.com/void-linux/void-packages/pull/39217

polari: remove mozjs78 from depends
polari only needs mozjs because of gjs and gjs already depends on mozjs (currently v91)

* use the gir build helper

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A patch file from https://github.com/void-linux/void-packages/pull/39217.patch is attached