Configuring prelude-extras-0.4.0.3... Building prelude-extras-0.4.0.3... Preprocessing library prelude-extras-0.4.0.3... [1 of 1] Compiling Prelude.Extras ( src/Prelude/Extras.hs, .stack-work/dist/x86_64-linux/Cabal-1.22.5.0/build/Prelude/Extras.o ) In-place registering prelude-extras-0.4.0.3... Installing library in /home/joey/.stack/snapshots/x86_64-linux/lts-5.5/7.10.3/lib/x86_64-linux-ghc-7.10.3/prelude-extras-0.4.0.3-1gQpKVfMHul71LsAFgGRhv Registering prelude-extras-0.4.0.3...