Resolving dependencies... cabal: '/opt/ghc/7.10.2/bin/ghc' exited with an error: : cannot satisfy -package-id attoparsec-0.13.0.1-6c1dca7c91cf58666f0446be739f1fb6 (use -v for more information) Failed to install conduit-extra-1.1.9.1 cabal: Error: some packages failed to install: conduit-extra-1.1.9.1 failed during the final install step. The exception was: ExitFailure 1 hadoop-tools-0.2 depends on conduit-extra-1.1.9.1 which failed to install.