Resolving dependencies... cabal: Could not resolve dependencies: next goal: transformers (dependency of linear-1.20.7) rejecting: transformers-0.5.2.0/installed-0.5... (conflict: transformers-compat-0.6.0.6:five => transformers>=0.4 && <0.5 || >=0.3 && <0.4 || >=0.2 && <0.3 || >=0.5.3 && <0.6) trying: transformers-0.5.5.0 trying: scientific-0.3.5.2/installed-HPE... (dependency of bytes-0.15.3) next goal: primitive (dependency of scientific-0.3.5.2/installed-HPE...) rejecting: primitive-0.6.2.0/installed-EI3... (conflict: transformers==0.5.5.0, primitive => transformers==0.5.2.0/installed-0.5...) rejecting: primitive-0.6.3.0, primitive-0.6.2.0, primitive-0.6.1.0, primitive-0.5.4.0, primitive-0.5.3.0, primitive-0.5.2.1, primitive-0.5.1.0, primitive-0.5.0.1, primitive-0.5, primitive-0.4.1, primitive-0.4.0.1, primitive-0.4, primitive-0.3.1, primitive-0.3, primitive-0.2.1, primitive-0.2, primitive-0.1, primitive-0.6 (conflict: scientific => primitive==0.6.2.0/installed-EI3...) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: MonadCatchIO-transformers, base, zeromq4-haskell, transformers, ihaskell, ipython-kernel, ihaskell-diagrams, linear, active