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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">Trying to build the repro case in Trac #14208, I get this<o:p></o:p></span></p>
<p class="Code">cabal install --with-ghc=/home/simonpj/5builds/ghc-8.4-branch/inplace/bin/ghc-stage2<o:p></o:p></p>
<p class="Code">Warning: cannot determine version of /home/simonpj/.cabal/bin/c2hs :<o:p></o:p></p>
<p class="Code">""<o:p></o:p></p>
<p class="Code">Resolving dependencies...<o:p></o:p></p>
<p class="Code">cabal: Could not resolve dependencies:<o:p></o:p></p>
<p class="Code">trying: exceptions-0.8.3 (dependency of streamly)<o:p></o:p></p>
<p class="Code">next goal: template-haskell (dependency of exceptions)<o:p></o:p></p>
<p class="Code">rejecting: template-haskell-2.13.0.0/installed-2.1... (conflict: exceptions =><o:p></o:p></p>
<p class="Code">template-haskell>=2.2 && <2.13)<o:p></o:p></p>
<p class="Code">rejecting: template-haskell-2.12.0.0, template-haskell-2.11.1.0,<o:p></o:p></p>
<p class="Code">template-haskell-2.11.0.0, template-haskell-2.10.0.0,<o:p></o:p></p>
<p class="Code">template-haskell-2.9.0.0, template-haskell-2.8.0.0, template-haskell-2.7.0.0,<o:p></o:p></p>
<p class="Code">template-haskell-2.6.0.0, template-haskell-2.5.0.0, template-haskell-2.4.0.1,<o:p></o:p></p>
<p class="Code">template-haskell-2.4.0.0, template-haskell-2.3.0.1, template-haskell-2.3.0.0,<o:p></o:p></p>
<p class="Code">template-haskell-2.2.0.0 (constraint from non-upgradeable package requires<o:p></o:p></p>
<p class="Code">installed instance)<o:p></o:p></p>
<p class="Code">After searching the rest of the dependency tree exhaustively, these were the<o:p></o:p></p>
<p class="Code">goals I've had most trouble fulfilling: template-haskell, exceptions,<o:p></o:p></p>
<p class="Code">streamly, transformers, base<o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">This is with my in-place build of GHC-8.4 (in-place but not modified in any way). I’ve done a ‘cabal upate’.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">What am I doing wrong?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">Simon<o:p></o:p></span></p>
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