Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: sys-process (user goal)
rejecting: sys-process-0.1.6, sys-process-0.1.5, sys-process-0.1.4,
sys-process-0.1.3, sys-process-0.1.2 (constraint from user target requires
==0.1.1)
trying: sys-process-0.1.1
trying: base-4.9.0.0/installed-4.9... (dependency of sys-process-0.1.1)
next goal: process (dependency of sys-process-0.1.1)
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 (conflict: sys-process => process>=1.2.3 &&
<1.3)
rejecting: process-1.2.3.0 (conflict: base==4.9.0.0/installed-4.9..., process
=> base>=4.4 && <4.9)
rejecting: process-1.2.2.0, process-1.2.1.0, process-1.2.0.0, process-1.1.0.2,
process-1.1.0.1, process-1.1.0.0, process-1.0.1.5, process-1.0.1.4,
process-1.0.1.3, process-1.0.1.2, process-1.0.1.1, process-1.0.0.0 (conflict:
sys-process => process>=1.2.3 && <1.3)
Dependency tree exhaustively searched.