Resolving dependencies...
cabal: Could not resolve dependencies:
trying: base-4.9.0.0/installed-4.9... (dependency of zmqat-0.2.0.0)
next goal: zeromq4-haskell (dependency of zmqat-0.2.0.0)
rejecting: 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: requires pkg-config
package libzmq>=4.0 && <5.0, not found in the pkg-config database)
trying: zeromq4-haskell-0.2
trying: transformers-0.5.2.0/installed-0.5... (dependency of
zeromq4-haskell-0.2)
next goal: MonadCatchIO-transformers (dependency of zeromq4-haskell-0.2)
rejecting: MonadCatchIO-transformers-0.3.1.3 (conflict:
base==4.9.0.0/installed-4.9..., MonadCatchIO-transformers => base<4.9)
rejecting: MonadCatchIO-transformers-0.3.1.2,
MonadCatchIO-transformers-0.3.1.1, MonadCatchIO-transformers-0.3.1.0
(conflict: base==4.9.0.0/installed-4.9..., MonadCatchIO-transformers =>
base<4.8)
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: base==4.9.0.0/installed-4.9..., MonadCatchIO-transformers =>
base<4.7)
rejecting: MonadCatchIO-transformers-0.1.0.1 (conflict:
transformers==0.5.2.0/installed-0.5..., MonadCatchIO-transformers =>
transformers==0.1.*)
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)
Dependency tree exhaustively searched.