Some build tools are using the old -XaddExports syntax. As specified in JEP 261, the syntax for -XaddExports is:

-XaddExports:<source-module>/<package>=<target-module>(,<target-module>)*

where <source-module> and <target-module> are module names and <package> is the name of a package.

The -XaddExports option can be used more than once, but at most once for any particular combination of source module and package name.