Alejandro Serrano Mena <trupill@gmail.com> writes:

> The instructions are quite clear. Alas, when I try to reproduce the steps
> using my home-build compiler (for which I mean set the `with-compiler` in
> `cabal.project` to the stage2 compiler obtained by Hadrian), I get:
>
>> cabal new-install --lib aeson
> Distribution/Client/CmdInstall.hs:(361,18)-(363,72): Non-exhaustive
> patterns in lambda
>
Interesting, this sounds like a cabal-install bug. What does
cabal-install --version say?