Using liquibase.properties alongside Spring config

I tried for ages to figure out a way to set preserveSchemaCase in Spring Boot’s application.yaml, until someone pointed out that just a subset of the settings were available through Spring!

So, I tried moving some of the config out into liquibase.properties, but it does not do anything. Some searching led me to believe that the liquibase config file is not actually picked up when using Spring Boot. Is that so? Does that mean that setting these props not exposed by Spring is only achievable through code? As in System.setProperty("liquibase.preserveSchemaCase", "true").

According to this guy, this does not seem possible, without a custom hack.