Currently the xlsx package doesn’t build docs because of the bzlib-conduit library.
Now I’m not allowed to upload either of these, but what I can do is change there name and upload a variant: https://hackage.haskell.org/package/bzlib-conduit-jappie-0.3.0.2
/but/ now I’ve to wait, it’d be more convenient if I could just run this builder locally (for example: matrix-build mypackage).
I’m asking here because this is not the first time I’m encountering this, pretty much all my packages have manually uploaded docs because I don’t know how to debug this custom builder.