fix unexpected variable issue in build
fix unexpected variable issue in build

ingwinlu/relx,bsmr-erlang/relx,priestjim/relx,ethercrow/relx,bitwalker/relx,Licenser/relx,timclassic/relx,syl20bnr/relx,zugolosian/relx,RJ/relx,umatomba/relx,tsloughter/relx,erlware/relx,lrascao/relx