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Is it safe to use multiple versions of `org.jetbrains.kotlin:kotlin-gradle-plugin` in a Gradle multi-project build?

I.e. I want to compile one subproject with 1.2, another one with 1.3.

I’m pretty sure you _can_ as long as each plugin is applied solely in their own scope of subprojects. The question you may want to consider is _why_.

Thanks Sam. I did some googling afterwards and came about <https://youtrack.jetbrains.com/issue/KT-30276> which is slightly worrying.
As for the why; parts of the project have to be compiled with 1.2 for bytecode compatibility reasons. Others need 1.3