Reset GHC_PACKAGE_PATH varialbe (5th try).
Reset GHC_PACKAGE_PATH varialbe (5th try).

See #110.

sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,snowleopard/shaking-up-ghc,bgamari/shaking-up-ghc,snowleopard/hadrian,izgzhen/hadrian