Using head.hackage

Ben Gamari ben at
Wed Sep 11 12:55:37 UTC 2019

Alejandro Serrano Mena <trupill at> 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?


- Ben

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 487 bytes
Desc: not available
URL: <>

More information about the ghc-devs mailing list