Hi everyone,

I'm trying to build the latest 8.1 sources on a Mac running El Capitan.  I'm getting an error I'd never seen before and wonder if anyone has any pointers of how I might fix things.  I blew away my GHC, re-cloned from github, reconfigured and I still get the same error.

The following are the relevant output lines; the problem is that the template-haskell version doesn't seem to match.  I'm not sure whether this is coming from the template-haskell in 8.1 or in 8.0.1 (which I'm using to build 8.1), but checking the latter I have version 2.11.0.0 which I assume should be sufficient.

John

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Configuring ghc-pkg-6.9...

Configuring ghc-8.1...

ghc-cabal: Encountered missing dependencies:

template-haskell ==2.11.* && ==2.12.0.0

make[1]: *** [compiler/stage1/package-data.mk] Error 1

make[1]: *** Waiting for unfinished jobs....

make: *** [all] Error 2

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internal-229:~/haskell/ghc> cabal update                                                                                                                                     (git)-[master]

Downloading the latest package list from hackage.haskell.org

Skipping download: local and remote files match.

internal-229:~/haskell/ghc> cabal install template-haskell                                                                                                                   (git)-[master]

Resolving dependencies...

All the requested packages are already installed:

template-haskell-2.11.0.0

Use --reinstall if you want to reinstall anyway.