Resolving dependencies...
cabal: Could not resolve dependencies:
trying: ihaskell-0.9.0.0 (user goal)
trying: base-4.9.1.0/installed-4.9... (dependency of ihaskell-0.9.0.0)
next goal: ipython-kernel (dependency of ihaskell-0.9.0.0)
rejecting: ipython-kernel-0.8.4.0 (conflict: base==4.9.1.0/installed-4.9...,
ipython-kernel => base>=4.6 && <4.9)
rejecting: ipython-kernel-0.8.3.0, ipython-kernel-0.8.2.0,
ipython-kernel-0.8.1.0, ipython-kernel-0.8.0.0, ipython-kernel-0.7.0.0,
ipython-kernel-0.6.1.3, ipython-kernel-0.6.1.2, ipython-kernel-0.6.1.1,
ipython-kernel-0.6.1.0, ipython-kernel-0.6.0.0, ipython-kernel-0.3.0.0,
ipython-kernel-0.1.0.0 (conflict: ihaskell => ipython-kernel>=0.8.4)
Dependency tree exhaustively searched.