Changelog for ghc-aeson-compat-0.3.9-2.12.x86_64.rpm :

* Mon Oct 01 2018 psimonsAATTsuse.com- Update aeson-compat to version 0.3.9. [#] 0.3.9 - Add `ToJSON/FromJSON Void`
* Tue Jul 10 2018 psimonsAATTsuse.com- Add aeson-compat at version 0.3.8.