BLD: use default build string
BLD: use default build string

enigmampc/catalyst,humdings/zipline,bartosh/zipline,Scapogo/zipline,wilsonkichoi/zipline,magne-max/zipline-ja,humdings/zipline,umuzungu/zipline,florentchandelier/zipline,Scapogo/zipline,magne-max/zipline-ja,alphaBenj/zipline,bartosh/zipline,florentchandelier/zipline,quantopian/zipline,enigmampc/catalyst,alphaBenj/zipline,umuzungu/zipline,wilsonkichoi/zipline,quantopian/zipline