Mac OS post install assumes Java is installed under `Library`

[bdemers]

Not all installations of java will be under /Library, for example tarball installs could be located anywhere.

In my case I was using jevn which shims JAVA_HOME to: ~/.jenv/versions/1.8. and the includes paths did NOT include darwin.

Maybe it would be easier to include all subdirectories of ${JAVA_HOME}/include/ ?

[bdemers]

(i worked around this by setting JAVA_HOME to a java install that was under /Library)