fix a deprecation warning from `go build`
fix a deprecation warning from `go build`

datawolf/os,luxas/os,imikushin/os,luxas/os,juliengk/os,rancherio/os,imikushin/os,gizmotronic/os,rancherio/os,luxas/os,rancher/os,juliengk/os,ibuildthecloud/os,rancher/os,ibuildthecloud/os,gizmotronic/os,SvenDowideit/os,SvenDowideit/os,datawolf/os,rancherio/os,datawolf/os