Resolving dependencies... Downloading memo-ptr-0.1.0.0... Configuring memo-ptr-0.1.0.0... Building memo-ptr-0.1.0.0... Preprocessing library memo-ptr-0.1.0.0... [1 of 1] Compiling Control.Memo ( src/Control/Memo.hs, dist/build/Control/Memo.o ) In-place registering memo-ptr-0.1.0.0... Running Haddock for memo-ptr-0.1.0.0... 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-memo-ptr-0.1.0278722862233665123.0 Installing library in /home/builder/hackage-server/build-cache/tmp-install/lib/x86_64-linux-ghc-7.10.2/memo-ptr-0.1.0.0-K1AS29paUMxHg9sjCqDqnO Registering memo-ptr-0.1.0.0... Installed memo-ptr-0.1.0.0