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 -------------------- 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 ---------------- 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.