How do you specify a separate file for a schema

[Timmmm]

Suppose I have a schema file schema.cue:

name: string
age: uint & <200

And I have another file that contains the data, data.cue:

name: "Dave"
age: 50

How do I link those files together? I tried:

import "./schema.cue"

But it tells me relative paths are not supported.

I can't see how IDEs can support highlighting errors and so on without something like this. (The VSCode extension doesn't support it anyway yet but I imagine it is on the TODO list.)