Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: cabal-sort (user goal)
rejecting: cabal-sort-0.0.5.2, 0.0.5.1, 0.0.5, 0.0.4.2, 0.0.4.1, 0.0.4,
0.0.3.1, 0.0.3 (global constraint requires ==0.0.2.1)
trying: cabal-sort-0.0.2.1
trying: base-4.8.1.0/installed-4f7... (dependency of cabal-sort-0.0.2.1)
next goal: process (dependency of cabal-sort-0.0.2.1)
rejecting: process-1.2.3.0/installed-f02..., 1.4.0.0, 1.3.0.0, 1.2.3.0,
1.2.2.0, 1.2.1.0, 1.2.0.0, 1.1.0.2, 1.1.0.1, 1.1.0.0 (conflict: cabal-sort =>
process>=1.0 && <1.1)
trying: process-1.0.1.5
next goal: unix (dependency of process-1.0.1.5)
rejecting: unix-2.7.1.0/installed-643... (conflict: bytestring==0.9.2.1, unix
=> bytestring==0.10.6.0/installed-236...)
trying: unix-2.7.1.0
trying: time-1.5.0.1/installed-c20... (dependency of unix-2.7.1.0)
next goal: containers (dependency of cabal-sort-0.0.2.1)
rejecting: containers-0.5.6.2/installed-2de..., 0.5.6.3, 0.5.6.2, 0.5.6.1,
0.5.6.0, 0.5.5.1, 0.5.5.0, 0.5.4.0, 0.5.3.1, 0.5.3.0, 0.5.2.1, 0.5.2.0,
0.5.1.0, 0.5.0.0 (conflict: cabal-sort => containers>=0.2 && <0.5)
rejecting: containers-0.4.2.1 (conflict: time =>
deepseq==1.4.1.1/installed-8fb..., containers => deepseq>=1.2 && <1.4)
rejecting: containers-0.4.2.0 (conflict: time =>
deepseq==1.4.1.1/installed-8fb..., containers => deepseq>=1.2 && <1.3)
rejecting: containers-0.4.1.0 (conflict: base==4.8.1.0/installed-4f7...,
containers => base>=4.2 && <4.8)
rejecting: containers-0.4.0.0, 0.3.0.0 (conflict:
base==4.8.1.0/installed-4f7..., containers => base>=4.2 && <4.7)
rejecting: containers-0.2.0.1, 0.2.0.0 (conflict:
base==4.8.1.0/installed-4f7..., containers => base<4.7)
rejecting: containers-0.1.0.1, 0.1.0.0 (conflict: cabal-sort =>
containers>=0.2 && <0.5)
Dependency tree exhaustively searched.