fabric make error etcd: does not contain package go.etcd.io/etcd/etcdserver/api/snap

go: finding module for package go.etcd.io/etcd/etcdserver/api/snap
consensus/etcdraft/storage.go:19:2: module go.etcd.io/etcd@latest found (v3.3.20+incompatible), but does not contain package go.etcd.io/etcd/etcdserver/api/snap

replace this :

go.etcd.io/etcd v3.3.20+incompatible

to :

go.etcd.io/etcd v0.5.0-alpha.5.0.20181228115726-23731bf9ba55

replace go.etcd.io/etcd v3.3.20+incompatible => go.etcd.io/etcd v0.5.0-alpha.5.0.20181228115726-23731bf9ba55

最后

go mod tidy