Proposed fix for IZPACK_DIST property in build.xml
In the current (commit 828cf739) version of build.xml, the IZPACK_DIST value is used as a ant property, and is dereferenced with ${IZPACK_DIST} . It is awkward to define the quantity, can be done with command line
ant -DIZPACK_DIST=/path/to/IzPack
However, the intention might have been to define IZPACK_DIST from the system environment variable IZPACK_DIST, in which case the build.xml should be edited to dereference, in 3 places, as ${env.IZPACK_DIST}
Attached is a diff output of a change I a tried which fixed the issue, afterwards the IZPACK_DIST environment variable could be used to specify the file system location of the IzPack distribution. build.xml.patch