Is there way to fix already transformed exception with vanilla classes mixins when using this?

[iocmet]

https://github.com/CrucibleMC/Grimoire-legacy/blob/legacy-1.7.10/src/main/java/io/github/crucible/grimoire/mixins/forge/MixinLoader.java
This is happening because mixins can't patch already loaded classes

[EverNife]

If you are using GRIMOIRE-LEGACY!

https://github.com/CrucibleMC/Grimoire-Mixins-1.7.10/blob/master/Mixin-Forge/build.gradle#L13-L18

You can add the ""target minecraft classes"" by making the mixin a ""CORE_PATCH""

To do so, you need to add the info to the MAINFEST of the .jar

This is how you can do that https://github.com/CrucibleMC/Grimoire-Mixins-1.7.10/blob/master/Mixin-Forge/build.gradle#L13-L18

[iocmet]

Im using this code from grimoire legacy (https://github.com/CrucibleMC/Grimoire-legacy/blob/legacy-1.7.10/src/main/java/io/github/crucible/grimoire/mixins/forge/MixinLoader.java) and i ran into problem that it says mod source duplication

[iocmet]

If jar with mixins is mod this happening, is it grimoire issue?

[iocmet]

I think it because of this but is there way to fix? i just want make mixin loader like in forge 1.15+ and fabric

[juanmuscaria]

I would recommend using an already existing loader like https://github.com/Aizistral-Studios/Grimoire or https://github.com/LegacyModdingMC/UniMixins/
Otherwise you will run into issues of multiple loaders trying to achieve the same thing and clashing with each other. Grimoire-legacy is only here for historical reasons