Backpack support?

[k0001]

I'm trying to build a project that uses Backpack. It builds fine with GHC, but it fails to build the signature module with GHCJS.

I'm using the GHCJS version offered by reflex-frp/reflex-platform@7265d88

Here's the minimal reproducible example, together with the compiler output: https://gist.github.com/k0001/c2bbc840f3c517a43e3afbd5296a2a51

Am I doing something wrong?

[k0001]

I tried splitting the multi-library Cabal project into four separate Cabal projects, and I still get the same issue (“No such file or directory”).