Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: json-tools (user goal)
rejecting: json-tools-0.5.0, 0.4.0, 0.3.1, 0.3.0 (global constraint requires
==0.2.4)
trying: json-tools-0.2.4
trying: tar-0.4.1.0 (dependency of json-tools-0.2.4)
trying: directory-1.2.1.0/installed-4c4... (dependency of tar-0.4.1.0)
trying: unix-2.7.0.1/installed-0d8... (dependency of
directory-1.2.1.0/installed-4c4...)
next goal: data-object-json (dependency of json-tools-0.2.4)
rejecting: data-object-json-0.3.1.8, 0.3.1.7, 0.3.1.6, 0.3.1.5, 0.3.1.4,
0.3.1.3, 0.3.1.2, 0.3.1.1, 0.3.1, 0.3.0, 0.0.0.1, 0.0.0 (conflict: unix =>
bytestring==0.10.4.0/installed-9f4..., data-object-json => bytestring>=0.9.1.4
&& <0.10)
Backjump limit reached (change with --max-backjumps).