options /default

Hi I'm working on the gnustep portgroup and have this problem in the portgroup : options gnustep.domain default gnustep.domain "" in a Portfile : build.args DO_LIB_LINK=yes gnustep.domain SYSTEM when running port, the gnustep.domain variable keeps its default value instead of the one provided by the Portfile. build.args is set alright BTW. thanks yves