go installation fails

[csabadm]

I'm trying to install sshpiper using go get -u -tags pam github.com/tg123/sshpiper/sshpiperd but I get the following error:

# github.com/tg123/sshpiper/sshpiperd/challenger
go/src/github.com/tg123/sshpiper/sshpiperd/challenger/provider.go:12:84: undefined: ssh.AdditionalChallengeContext
# github.com/tg123/sshpiper/sshpiperd/upstream
go/src/github.com/tg123/sshpiper/sshpiperd/upstream/provider.go:17:59: undefined: ssh.AdditionalChallengeContext
go/src/github.com/tg123/sshpiper/sshpiperd/upstream/provider.go:17:103: undefined: ssh.AuthPipe

Tried with go version 1.12 and 1.13.

[tg123]

go get does not work well with go mod
please try

git clone https://github.com/tg123/sshpiper.git
cd sshpiper/sshpiperd/
GO111MODULE=on go build

and

GO111MODULE=on go install

if you want to install to $GOPATH/bin

[csabadm]

It worked.
Thank you.

[tg123]

golang/go#30354