JetBrains has its own JCEF version that does not have a good build system like yours yet: https://github.com/JetBrains/jcef
The original JCEF project seems to have quite a few bugs that have been open for 5-10 years now and it does not seem they will be getting fixed anytime soon, and JetBrains JCEF has more or less fixed all of them.
This is way over my knowledge so I can't do PR myself, but I am suggesting that this project would switch to their JCEF or provide alternative builds to choose from official or JBR JCEF variants.
JetBrains has its own JCEF version that does not have a good build system like yours yet: https://github.com/JetBrains/jcef
The original JCEF project seems to have quite a few bugs that have been open for 5-10 years now and it does not seem they will be getting fixed anytime soon, and JetBrains JCEF has more or less fixed all of them.
This is way over my knowledge so I can't do PR myself, but I am suggesting that this project would switch to their JCEF or provide alternative builds to choose from official or JBR JCEF variants.