[root@harbor250 perf]# HARBOR_SIZE=small HARBOR_URL=https://192.168.2.250:443 go run mage.go prepare
mage.go:8:2: cannot find package "github.com/magefile/mage/mage" in any of:
/usr/lib/golang/src/github.com/magefile/mage/mage (from $GOROOT)
/root/go/src/github.com/magefile/mage/mage (from $GOPATH)