Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: anansi (user goal)
rejecting: anansi-0.4.7, 0.4.6, 0.4.5, 0.4.4, 0.4.3, 0.4.2, 0.4.1, 0.4, 0.3.3
(global constraint requires ==0.3.2.1)
trying: anansi-0.3.2.1
trying: base-4.7.0.1/installed-e4b... (dependency of anansi-0.3.2.1)
next goal: system-fileio (dependency of anansi-0.3.2.1)
rejecting: system-fileio-0.3.16.3, 0.3.16.2, 0.3.16.1, 0.3.16, 0.3.15, 0.3.14,
0.3.13, 0.3.12, 0.3.11, 0.3.10, 0.3.9, 0.3.8, 0.3.7, 0.3.6, 0.3.5, 0.3.4,
0.3.3, 0.3.2.1, 0.3.2, 0.3.1, 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-2.7.0.1/installed-0d8..., 2.7.1.0, 2.7.0.1, 2.7.0.0, 2.6.0.1,
2.6.0.0 (conflict: system-fileio => unix>=2.3 && <2.6)
rejecting: unix-2.5.1.1, 2.5.1.0 (conflict: base==4.7.0.1/installed-e4b...,
unix => base>=4.5 && <4.6)
rejecting: unix-2.5.0.0 (conflict: base==4.7.0.1/installed-e4b..., unix =>
base>=4.2 && <4.5)
rejecting: unix-2.4.2.0, 2.4.1.0 (conflict: base==4.7.0.1/installed-e4b...,
unix => base>=4.2 && <4.4)
rejecting: unix-2.4.0.2, 2.4.0.1 (conflict: base==4.7.0.1/installed-e4b...,
unix => base>=4.2 && <4.3)
rejecting: unix-2.4.0.0 (conflict: base==4.7.0.1/installed-e4b..., unix =>
base>=4.1 && <4.3)
rejecting: unix-2.3.2.0, 2.3.1.0, 2.3.0.0 (conflict:
base==4.7.0.1/installed-e4b..., unix => base<4.3)
rejecting: unix-2.2.0.0, 2.0 (conflict: system-fileio => unix>=2.3 && <2.6)
Dependency tree exhaustively searched.