path=example.com/m@v1
version=v1.0.0
hash=h1:W4OVf+GhuR8uGVPxUsw60LKchTUbx+6hPgZygdB2reM=
-- cue.mod/module.cue --
module: "example.com/m"

-- sub/cue.mod/module.cue --
module: "example.com/m/sub"
-- sub/x.go' --
invalid name, but this shouldn't be read