Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: yesod-json (user goal)
rejecting: yesod-json-1.2.0, 1.1.2.2, 1.1.2.1, 1.1.2, 1.1.1, 1.1.0, 1.0.1.0,
1.0.0.1, 1.0.0, 0.3.1, 0.2.3, 0.2.2.3, 0.2.2.2, 0.2.2.1, 0.2.2, 0.2.1,
0.1.1.2, 0.1.1.1, 0.1.1, 0.1.0, 0.0.0.1 (global constraint requires ==0.0.0)
trying: yesod-json-0.0.0
next goal: text (dependency of yesod-json-0.0.0)
rejecting: text-1.2.1.1, 1.2.1.0, 1.2.0.6, 1.2.0.5, 1.2.0.4, 1.2.0.3, 1.2.0.2,
1.2.0.0, 1.1.1.4, 1.1.1.3, 1.1.1.2, 1.1.1.1, 1.1.1.0, 1.1.0.1, 1.1.0.0,
1.0.0.1, 1.0.0.0 (conflict: yesod-json => text>=0.8 && <0.12)
trying: text-0.11.3.1
trying: bytestring-0.10.4.0/installed-9f4... (dependency of text-0.11.3.1)
next goal: json-enumerator (dependency of yesod-json-0.0.0)
rejecting: json-enumerator-0.0.1.2, 0.0.1.1, 0.0.1, 0.0.0 (conflict:
bytestring==0.10.4.0/installed-9f4..., json-enumerator => bytestring>=0.9 &&
<0.10)
Backjump limit reached (change with --max-backjumps).