Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] trying: zeromq4-patterns-0.3.1.0 (user goal)
[__1] next goal: zeromq4-haskell (dependency of zeromq4-patterns)
[__1] rejecting: zeromq4-haskell-0.7.0, zeromq4-haskell-0.6.7,
zeromq4-haskell-0.6.6, zeromq4-haskell-0.6.5, zeromq4-haskell-0.6.4,
zeromq4-haskell-0.6.3, zeromq4-haskell-0.6.2, zeromq4-haskell-0.6.1,
zeromq4-haskell-0.6, zeromq4-haskell-0.5.1, zeromq4-haskell-0.5,
zeromq4-haskell-0.4.1, zeromq4-haskell-0.4, zeromq4-haskell-0.3.2,
zeromq4-haskell-0.3.1, zeromq4-haskell-0.3 (conflict: pkg-config package
libzmq>=4.0 && <5.0, not found in the pkg-config database)
[__1] trying: zeromq4-haskell-0.2
[__2] trying: transformers-0.5.2.0/installed-0.5... (dependency of
zeromq4-haskell)
[__3] next goal: MonadCatchIO-transformers (dependency of zeromq4-haskell)
[__3] rejecting: MonadCatchIO-transformers-0.3.1.3 (conflict: transformers =>
base==4.10.1.0/installed-4.1..., MonadCatchIO-transformers => base<4.9)
[__3] rejecting: MonadCatchIO-transformers-0.3.1.2,
MonadCatchIO-transformers-0.3.1.1, MonadCatchIO-transformers-0.3.1.0
(conflict: transformers => base==4.10.1.0/installed-4.1...,
MonadCatchIO-transformers => base<4.8)
[__3] rejecting: MonadCatchIO-transformers-0.3.0.0,
MonadCatchIO-transformers-0.2.2.3, MonadCatchIO-transformers-0.2.2.2,
MonadCatchIO-transformers-0.2.2.1, MonadCatchIO-transformers-0.2.2.0,
MonadCatchIO-transformers-0.2.1.0, MonadCatchIO-transformers-0.2.0.0
(conflict: transformers => base==4.10.1.0/installed-4.1...,
MonadCatchIO-transformers => base<4.7)
[__3] rejecting: MonadCatchIO-transformers-0.1.0.1 (conflict:
transformers==0.5.2.0/installed-0.5..., MonadCatchIO-transformers =>
transformers==0.1.*)
[__3] rejecting: MonadCatchIO-transformers-0.1.0.0,
MonadCatchIO-transformers-0.0.2.0, MonadCatchIO-transformers-0.0.1.0
(conflict: transformers==0.5.2.0/installed-0.5..., MonadCatchIO-transformers
=> transformers<0.2)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: MonadCatchIO-transformers,
transformers, base, zeromq4-haskell, zeromq4-patterns