Curve Modifier not working with a Geometry-Nodes curve as the "Curve Object"?

I have an object I want to deform along a curve. For that, I'm using a Curve Modifier and the curve is procedurally made with geometry-nodes, but when I select it as the "Curve Object" it doesn't work (the object stays unaffected).

It works perfectly with normal curves, just not with the geo-nodes one.

This is the Curve Modifier:

This is the procedural curve (it has the Mesh to Curve node):

Is there something I need to do to use a geo-nodes curve on a Curve Modifier, or is it impossible and the only way is to make a procedural "Curve Modifier" with geo-nodes inside the object?

Thanks in advance!!!