Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: yackage (user goal)
rejecting: yackage-0.8.1, yackage-0.8.0, yackage-0.7.0.8, yackage-0.7.0.7,
yackage-0.7.0.6, yackage-0.7.0.5, yackage-0.7.0.4, yackage-0.7.0.3,
yackage-0.7.0.2, yackage-0.7.0.1, yackage-0.7.0, yackage-0.6.0.5,
yackage-0.6.0.4, yackage-0.6.0.3, yackage-0.6.0.2, yackage-0.6.0.1,
yackage-0.6.0, yackage-0.5.0.1, yackage-0.5.0 (constraint from user target
requires ==0.4.0)
trying: yackage-0.4.0
trying: deepseq-1.4.2.0/installed-1.4... (dependency of
unordered-containers-0.2.7.2)
next goal: http-types (dependency of yackage-0.4.0)
rejecting: http-types-0.9.1, http-types-0.9, http-types-0.8.6,
http-types-0.8.5, http-types-0.8.4, http-types-0.8.3, http-types-0.8.2,
http-types-0.8.1, http-types-0.8.0, http-types-0.7.3.0.1, http-types-0.7.3,
http-types-0.7.2, http-types-0.7.1, http-types-0.7.0 (conflict: yackage =>
http-types>=0.6 && <0.7)
rejecting: http-types-0.6.11, http-types-0.6.10, http-types-0.6.9,
http-types-0.6.8 (conflict: deepseq => array==0.5.1.1/installed-0.5...,
http-types => array>=0.2 && <0.5)
rejecting: http-types-0.6.7, http-types-0.6.6, http-types-0.6.5.1,
http-types-0.6.5, http-types-0.6.4, http-types-0.6.3 (conflict: deepseq =>
array==0.5.1.1/installed-0.5..., http-types => array>=0.2 && <0.4)
rejecting: http-types-0.6.2, http-types-0.6.1, http-types-0.6.0.1,
http-types-0.6.0 (conflict: deepseq => array==0.5.1.1/installed-0.5...,
http-types => array>=0.3 && <0.4)
rejecting: http-types-0.5.3, http-types-0.5.2, http-types-0.5.1,
http-types-0.5, http-types-0.4.1, http-types-0.4.0, http-types-0.3.1,
http-types-0.3.0, http-types-0.2.0, http-types-0.1.1, http-types-0.1
(conflict: yackage => http-types>=0.6 && <0.7)
Dependency tree exhaustively searched.