Re: GHC packages' inputs leak in guix shell

[Lars-Dominik Braun]

Hi Simon,

> Right?  Well, I do not know if it is possible.  I guess it is because of
> this file:
> 
> --8<---------------cut here---------------start------------->8---
> $ find $(guix build ghc-esqueleto) -type f -print | grep base64
> /gnu/store/zqax59v1v537h26g0kypka6klaaahnqf-ghc-esqueleto-3.5.8.1/lib/ghc-9.2.5/ghc-esqueleto-3.5.8.1.conf.d/base64-bytestring-1.2.1.0-CQYLTs5ShsEFl2lwe4hRrI.conf
> --8<---------------cut here---------------end--------------->8---
> 
> Lars, WDYT?

your analysis is correct, but due to the nature of how Haskell builds work
we cannot remove that file (because anything depending on ghc-esqueleto
would not build any more) or relocate it to a different output (because
that would cause a cycle).

I can’t check right now, but I’m guessing a plain `cabal install`
would also add base64-bytestring to GHC’s visible packages?

Cheers,
Lars