improved onExec and calling callback in build funtion
improved onExec and calling callback in build funtion

hayesgm/brunch,kidaa/brunch,rlugojr/brunch,justinwoo/brunch,brunch/brunch,PeterDaveHello/brunch,Flaise/brunch,ondreian/brunch,lalomartins/brunch,hellyeahllc/brunch