Resolving dependencies... Downloading counter-0.1.0.1... Configuring counter-0.1.0.1... Building counter-0.1.0.1... Preprocessing library counter-0.1.0.1... [1 of 1] Compiling Data.Counter ( src/Data/Counter.hs, dist/build/Data/Counter.o ) In-place registering counter-0.1.0.1... Running Haddock for counter-0.1.0.1... cabal: Haddock's internal GHC version must match the configured GHC version. The GHC version is 7.10.2 but haddock is using GHC version 7.8.3 Creating package registration file: /tmp/pkgConf-counter-0.1.0278722862233665123.1 Installing library in /home/builder/hackage-server/build-cache/tmp-install/lib/x86_64-linux-ghc-7.10.2/counter-0.1.0.1-AjH8TgfkBesK1kkrxa0ng3 Registering counter-0.1.0.1... Installed counter-0.1.0.1