[Haskell-cafe] Trouble building happy/alex with Stack lts-9.20

Dan Burton danburton.email at gmail.com
Mon Dec 25 05:29:13 UTC 2017

/cc the haskell-stack mailing list.

On Dec 24, 2017 9:08 AM, "Eric McCorkle" <eric at metricspace.net> wrote:

> Hi folks,
> I'm trying to update my language project to happy >= 9.16, so I can use
> typeclass-based parsers.  Unfortunately, I'm running into build errors
> after switching to lts-9.20.  The log file is attached.
> I see similar problems when trying to build alex (the lexer generator).
> It seems to be claiming that there is no cabal file, which is odd, as
> there clearly is one (in the source at least).
> Has anyone else seen this problem, and if so, what is the workaround?
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