If you are only using the directory `liquibase-core` then that will not work. After cloning the repository, you need to build from the root directory rather than any of the sub-directories.
You said you did that, so the next question would be what branch are you using? The master branch may have some issues, so you should be using the 3.8.x branch for now. We will be 'getting back to master' in the near future, but for now that should not be depended on.
Steve Donie
Principal Software Engineer
Liquibase Community Engagement
Datical, Inc. http://www.datical.com/
Steve Donie
Principal Software Engineer
Liquibase Community Engagement
Datical, Inc. http://www.datical.com/