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

[Michael Snoyman]

What command are you running to generate this output? Are you able to
`stack unpack happy && cd happy-* && stack init && stack build`
successfully?

On Mon, Dec 25, 2017 at 7:29 AM, Dan Burton <danburton.email at gmail.com>
wrote:

> /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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