Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: streams (user goal)
rejecting: streams-3.3, streams-3.2.1, streams-3.2, streams-3.1.1,
streams-3.1, streams-3.0.1.1, streams-3.0.1, streams-3.0.0.1, streams-3.0,
streams-0.8.2, streams-0.8.1, streams-0.8.0.4, streams-0.8.0.3 (constraint
from user target requires ==0.8.0.2)
trying: streams-0.8.0.2
trying: base-4.9.0.0/installed-4.9... (dependency of streams-0.8.0.2)
next goal: semigroups (dependency of streams-0.8.0.2)
rejecting: semigroups-0.18.2, semigroups-0.18.1, semigroups-0.18.0.1,
semigroups-0.18, semigroups-0.17.0.1, semigroups-0.17, semigroups-0.16.2.2,
semigroups-0.16.2.1, semigroups-0.16.2, semigroups-0.16.1,
semigroups-0.16.0.1, semigroups-0.16, semigroups-0.15.4, semigroups-0.15.3,
semigroups-0.15.2, semigroups-0.15.1, semigroups-0.15, semigroups-0.14,
semigroups-0.13.0.1, semigroups-0.13, semigroups-0.12.2, semigroups-0.12.1,
semigroups-0.12.0.1, semigroups-0.12, semigroups-0.11, semigroups-0.10,
semigroups-0.9.2, semigroups-0.9.1, semigroups-0.9, semigroups-0.8.5,
semigroups-0.8.4.1, semigroups-0.8.4, semigroups-0.8.3.2, semigroups-0.8.3.1,
semigroups-0.8.3, semigroups-0.8.2, semigroups-0.8.0.1, semigroups-0.8,
semigroups-0.7.1.2, semigroups-0.7.1.1, semigroups-0.7.1, semigroups-0.7.0,
semigroups-0.6.1, semigroups-0.6 (conflict: streams => semigroups>=0.5 &&
<0.6)
rejecting: semigroups-0.5.0.2, semigroups-0.5.0.1 (conflict:
base==4.9.0.0/installed-4.9..., semigroups => base>=4 && <4.5)
rejecting: semigroups-0.5.0 (conflict: base==4.9.0.0/installed-4.9...,
semigroups => base>=4 && <4.4)
rejecting: semigroups-0.4.0, semigroups-0.3.4.2, semigroups-0.3.4.1,
semigroups-0.3.4, semigroups-0.3.3, semigroups-0.3.2, semigroups-0.3.1,
semigroups-0.3.0, semigroups-0.2.0, semigroups-0.1.0 (conflict: streams =>
semigroups>=0.5 && <0.6)
Dependency tree exhaustively searched.