<div dir="ltr">What command are you running to generate this output? Are you able to `stack unpack happy && cd happy-* && stack init && stack build` successfully?<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Dec 25, 2017 at 7:29 AM, Dan Burton <span dir="ltr"><<a href="mailto:danburton.email@gmail.com" target="_blank">danburton.email@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto">/cc the haskell-stack mailing list.</div><div class="gmail_extra"><br><div class="gmail_quote"><div><div class="h5">On Dec 24, 2017 9:08 AM, "Eric McCorkle" <<a href="mailto:eric@metricspace.net" target="_blank">eric@metricspace.net</a>> wrote:<br type="attribution"></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5">Hi folks,<br>
<br>
I'm trying to update my language project to happy >= 9.16, so I can use<br>
typeclass-based parsers. Unfortunately, I'm running into build errors<br>
after switching to lts-9.20. The log file is attached.<br>
<br>
I see similar problems when trying to build alex (the lexer generator).<br>
<br>
It seems to be claiming that there is no cabal file, which is odd, as<br>
there clearly is one (in the source at least).<br>
<br>
Has anyone else seen this problem, and if so, what is the workaround?<br>
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