Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: vacuum-ubigraph (user goal)
rejecting: vacuum-ubigraph-0.2.0.2, 0.2.0.1, 0.2.0.0, 0.1.0.3 (global
constraint requires ==0.1.0.2)
trying: vacuum-ubigraph-0.1.0.2
trying: base-4.8.1.0/installed-4f7... (dependency of vacuum-ubigraph-0.1.0.2)
next goal: HTTP (dependency of vacuum-ubigraph-0.1.0.2)
rejecting: HTTP-4000.2.21, 4000.2.20, 4000.2.19, 4000.2.18, 4000.2.17,
4000.2.16.1, 4000.2.16, 4000.2.15, 4000.2.14, 4000.2.13, 4000.2.12, 4000.2.11,
4000.2.10, 4000.2.9, 4000.2.8, 4000.2.7, 4000.2.6, 4000.2.5, 4000.2.4,
4000.2.3, 4000.2.2, 4000.2.1, 4000.2.0, 4000.1.2, 4000.1.1, 4000.1.0,
4000.0.10, 4000.0.9, 4000.0.8, 4000.0.7, 4000.0.6, 4000.0.5, 4000.0.4,
4000.0.3, 4000.0.2, 4000.0.1, 4000.0.0 (conflict: vacuum-ubigraph =>
HTTP<4000)
trying: HTTP-3001.1.5
rejecting: HTTP-3001.1.5:-old-base (conflict: base==4.8.1.0/installed-4f7...,
HTTP-3001.1.5:old-base => base>=3 && <4)
rejecting: HTTP-3001.1.5:+old-base (conflict: base==4.8.1.0/installed-4f7...,
HTTP-3001.1.5:old-base => base<3)
Backjump limit reached (change with --max-backjumps).