clientv3 code in README is not working

[zbindenren]

% mkdir testetcd
% cd testetcd
% go mod init
go: creating new go.mod: module github.com/zbindenren/testetcd
% go clean -modcache
% go get go.etcd.io/etcd/clientv3
go: downloading go.etcd.io/etcd v0.5.0-alpha.5
go: downloading go.etcd.io/etcd v3.3.25+incompatible
go: found go.etcd.io/etcd/clientv3 in go.etcd.io/etcd v3.3.25+incompatible
go: finding module for package github.com/coreos/etcd/clientv3/credentials
go: finding module for package github.com/coreos/etcd/auth/authpb
go: finding module for package github.com/coreos/etcd/pkg/logutil
go: finding module for package github.com/coreos/etcd/etcdserver/api/v3rpc/rpctypes
go: finding module for package github.com/coreos/etcd/etcdserver/etcdserverpb
go: finding module for package github.com/coreos/etcd/version
go: finding module for package google.golang.org/grpc/metadata
go: finding module for package github.com/coreos/etcd/clientv3/balancer
go: finding module for package google.golang.org/grpc/codes
go: finding module for package google.golang.org/grpc/status
go: downloading github.com/coreos/etcd v0.5.0-alpha.5
go: downloading google.golang.org/grpc v1.32.0
go: downloading github.com/coreos/etcd v3.3.25+incompatible
go: finding module for package github.com/coreos/etcd/pkg/types
go: finding module for package github.com/google/uuid
go: finding module for package go.uber.org/zap
...
# github.com/coreos/etcd/clientv3/balancer/picker
../../../../pkg/mod/github.com/coreos/etcd@v3.3.25+incompatible/clientv3/balancer/picker/err.go:37:44: undefined: balancer.PickOptions
../../../../pkg/mod/github.com/coreos/etcd@v3.3.25+incompatible/clientv3/balancer/picker/roundrobin_balanced.go:55:54: undefined: balancer.PickOptions
# github.com/coreos/etcd/clientv3/balancer/resolver/endpoint
../../../../pkg/mod/github.com/coreos/etcd@v3.3.25+incompatible/clientv3/balancer/resolver/endpoint/endpoint.go:114:78: undefined: resolver.BuildOption
../../../../pkg/mod/github.com/coreos/etcd@v3.3.25+incompatible/clientv3/balancer/resolver/endpoint/endpoint.go:182:31: undefined: resolver.ResolveNowOption

Has anybody a working go.mod file that works with google.golang.org/grp > 1.26.0? See also: #11931

[zbindenren]

Should be fixed with release 3.5: #12124 (comment)