Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: ecu (user goal)
rejecting: ecu-0.0.8, 0.0.7, 0.0.6, 0.0.5, 0.0.4, 0.0.3, 0.0.2, 0.0.1 (global
constraint requires ==0.0.0)
trying: ecu-0.0.0
trying: vcd-0.2.2 (dependency of ecu-0.0.0)
trying: polyparse-1.11 (dependency of vcd-0.2.2)
trying: text-1.2.1.0 (dependency of polyparse-1.11)
next goal: bytestring (dependency of ecu-0.0.0)
rejecting: bytestring-0.10.4.0/installed-9f4..., 0.10.6.0, 0.10.4.1, 0.10.4.0,
0.10.2.0, 0.10.0.2, 0.10.0.1, 0.10.0.0, 0.9.2.1, 0.9.2.0 (conflict: ecu =>
bytestring>=0.9.1 && <0.9.2)
rejecting: bytestring-0.9.1.10, 0.9.1.9, 0.9.1.8, 0.9.1.7, 0.9.1.6, 0.9.1.5,
0.9.1.4, 0.9.1.3, 0.9.1.2, 0.9.1.1, 0.9.1.0 (conflict: text =>
bytestring>=0.10.4.0)
rejecting: bytestring-0.9.0.4, 0.9.0.3, 0.9.0.2, 0.9.0.1, 0.9 (conflict: ecu
=> bytestring>=0.9.1 && <0.9.2)
Dependency tree exhaustively searched.