Resolving dependencies...
cabal: Could not resolve dependencies:
trying: base-4.9.0.0/installed-4.9... (dependency of cabal-dev-0.9.2)
next goal: process (dependency of cabal-dev-0.9.2)
rejecting: process-1.4.2.0/installed-1.4..., process-1.4.2.0, process-1.4.1.0,
process-1.4.0.0, process-1.3.0.0, process-1.2.3.0, process-1.2.2.0,
process-1.2.1.0, process-1.2.0.0 (conflict: cabal-dev => process>=1.0 && <1.2)
rejecting: process-1.1.0.2 (conflict: base==4.9.0.0/installed-4.9..., process
=> base>=4 && <4.7 || >=3 && <4)
trying: process-1.1.0.1
next goal: directory (dependency of process-1.1.0.1)
rejecting: directory-1.2.6.2/installed-1.2..., directory-1.2.7.0,
directory-1.2.6.3, directory-1.2.6.2, directory-1.2.5.1, directory-1.2.5.0,
directory-1.2.4.0, directory-1.2.3.1, directory-1.2.3.0, directory-1.2.2.1,
directory-1.2.2.0, directory-1.2.1.0, directory-1.2.0.1, directory-1.2.0.0
(conflict: process => directory>=1.0 && <1.2)
rejecting: directory-1.1.0.2 (conflict: base==4.9.0.0/installed-4.9...,
directory => base>=4.4 && <4.6)
rejecting: directory-1.1.0.1 (conflict: base==4.9.0.0/installed-4.9...,
directory => base>=4.2 && <4.5)
rejecting: directory-1.1.0.0, directory-1.0.1.2 (conflict:
base==4.9.0.0/installed-4.9..., directory => base>=4.2 && <4.4)
rejecting: directory-1.0.1.1, directory-1.0.1.0 (conflict:
base==4.9.0.0/installed-4.9..., directory => base>=4.1 && <4.3)
rejecting: directory-1.0.0.3, directory-1.0.0.0 (conflict:
base==4.9.0.0/installed-4.9..., directory => base<4.3)
rejecting: directory-1.2.6.1 (conflict: process => directory>=1.0 && <1.2)
Dependency tree exhaustively searched.