Did a quick code search and traced the culprit to https://github.com/commercialhaskell/stack/blob/28cb09e756ec19dd4acae4f1069db61784bc8aae/src/Stack/Setup.hs#L444
Try running `stack setup --verbose`, maybe it'll give you (and us) a hint about what exactly it tries to find or how it detects your system now and at 1.6. On Thu, May 24, 2018 at 4:22 PM Thomas Løcke <thomas.granv...@gmail.com> wrote: > Hi all > > Since upgrading from 1.6.5 to 1.7.1 stack no longer works. When I try to > build my projects, all I get is a "*I don't know how to install GHC on > your system configuration, please install manually*" message. > > I've been using stack for a little over a year, and this is a first for > me. I've no idea how to fix it. > > I use Slackware 14.2 on all my systems. The problem persists on all > systems. > > Any and all advice is more than welcome. :o) > > -- > You received this message because you are subscribed to the Google Groups > "haskell-stack" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to haskell-stack+unsubscr...@googlegroups.com. > To post to this group, send email to haskell-stack@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/haskell-stack/2a7f49c2-bc0f-405d-8269-92df30a73621%40googlegroups.com > <https://groups.google.com/d/msgid/haskell-stack/2a7f49c2-bc0f-405d-8269-92df30a73621%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "haskell-stack" group. To unsubscribe from this group and stop receiving emails from it, send an email to haskell-stack+unsubscr...@googlegroups.com. To post to this group, send email to haskell-stack@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/haskell-stack/CAPkELw5nnSPLUnrpMtPZAy%3DqJ1kS4U9spSv_oBT%3Do_n%3DJ-%2BJhg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.