Build fails with:

 github.com/godbus/dbus
 # github.com/godbus/dbus
 ../.gopath/pkg/mod/github.com/godbus/dbus@v4.1.0+incompatible/transport_unix.go:51:10: cannot use t (variable of type *unixTransport) as transport value in return statement: *unixTransport does not implement transport (missing method SendNullByte)
 ../.gopath/pkg/mod/github.com/godbus/dbus@v4.1.0+incompatible/transport_unix.go:57:10: cannot use t (variable of type *unixTransport) as transport value in return statement: *unixTransport does not implement transport (missing method SendNullByte)
