/usr/bin/ghc --make -package-name show-0.4.1.1 -hide-all-packages -fbuilding-cabal-package -i -idist/build -i. -idist/build/autogen -Idist/build/autogen -Idist/build -optP-include -optPdist/build/autogen/cabal_macros.h -odir dist/build -hidir dist/build -stubdir dist/build -package-id QuickCheck-2.4.0.1-5898cfb0116fc1d6ecef04b3f053c323 -package-id base-4.3.1.0-167743fc0dd86f7f2a24843a933b9dce -package-id random-1.0.0.3-749b78c54a8a99991b32dbb45d98a91b -package-id smallcheck-0.4-008eb21a2943dfdde26401dbc145c45b -package-id syb-0.3-8db7bc4339a1cb8a6f2a46c40447ef0b -O -Wall -XHaskell98 ShowQ ShowFun SimpleReflect <command line>: cannot satisfy -package-id random-1.0.0.3-749b78c54a8a99991b32dbb45d98a91b: random-1.0.0.3-749b78c54a8a99991b32dbb45d98a91b is shadowed by package random-1.0.0.3-57524486875e0c4c260dd22788921013 (use -v for more information) World file is already up to date. cabal: Error: some packages failed to install: lambdabot-4.2.3.2 depends on show-0.4.1.1 which failed to install. lambdabot-utils-4.2.1 failed during the building phase. The exception was: ExitFailure 1 readline-1.0.1.0 failed during the configure step. The exception was: ExitFailure 1 show-0.4.1.1 failed during the building phase. The exception was: ExitFailure 1 I have ghc 7.0.,3 and cabal $ cabal --version cabal-install version 0.10.2 using version 1.10.1.0 of the Cabal library From the recent Haskell Platform for OS X. Ideas?