https://sourceforge.net/tracker/?func=detail&aid=2700937&group_id=176962&atid=879334
Files are read in following order: ${user.home}/.adempiere.properties utils_dev/mybuild.properties utils_dev/build.properties Since ant properties are immutable value set first stays.
Now properties are loaded in utils_dev/properties.xml and and imported from there to every other build file.