Resolving dependencies...
cabal: Could not resolve dependencies:
trying: base-4.9.0.0/installed-4.9... (dependency of anansi-0.3.1)
next goal: system-fileio (dependency of anansi-0.3.1)
rejecting: system-fileio-0.3.16.3, system-fileio-0.3.16.2,
system-fileio-0.3.16.1, system-fileio-0.3.16, system-fileio-0.3.15,
system-fileio-0.3.14, system-fileio-0.3.13, system-fileio-0.3.12,
system-fileio-0.3.11, system-fileio-0.3.10, system-fileio-0.3.9,
system-fileio-0.3.8, system-fileio-0.3.7, system-fileio-0.3.6,
system-fileio-0.3.5, system-fileio-0.3.4, system-fileio-0.3.3,
system-fileio-0.3.2.1, system-fileio-0.3.2, system-fileio-0.3.1,
system-fileio-0.3 (conflict: anansi => system-fileio>=0.1 && <0.3)
trying: system-fileio-0.2.7
next goal: unix (dependency of system-fileio-0.2.7)
rejecting: unix-2.7.2.0/installed-2.7..., unix-2.7.2.1, unix-2.7.2.0,
unix-2.7.1.0, unix-2.7.0.1, unix-2.7.0.0, unix-2.6.0.1, unix-2.6.0.0
(conflict: system-fileio => unix>=2.3 && <2.6)
rejecting: unix-2.5.1.1, unix-2.5.1.0 (conflict:
base==4.9.0.0/installed-4.9..., unix => base>=4.5 && <4.6)
rejecting: unix-2.5.0.0 (conflict: base==4.9.0.0/installed-4.9..., unix =>
base>=4.2 && <4.5)
rejecting: unix-2.4.2.0, unix-2.4.1.0 (conflict:
base==4.9.0.0/installed-4.9..., unix => base>=4.2 && <4.4)
rejecting: unix-2.4.0.2, unix-2.4.0.1 (conflict:
base==4.9.0.0/installed-4.9..., unix => base>=4.2 && <4.3)
rejecting: unix-2.4.0.0 (conflict: base==4.9.0.0/installed-4.9..., unix =>
base>=4.1 && <4.3)
rejecting: unix-2.3.2.0, unix-2.3.1.0, unix-2.3.0.0 (conflict:
base==4.9.0.0/installed-4.9..., unix => base<4.3)
rejecting: unix-2.2.0.0, unix-2.0 (conflict: system-fileio => unix>=2.3 &&
<2.6)
Dependency tree exhaustively searched.