Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: SourceGraph (user goal)
rejecting: SourceGraph-0.7.0.7, 0.7.0.6, 0.7.0.5, 0.7.0.4, 0.7.0.3, 0.7.0.2,
0.7.0.1, 0.7.0.0, 0.6.1.1, 0.6.0.2, 0.6.0.1, 0.6.0.0, 0.5.5.0, 0.5.2.0,
0.5.1.0, 0.5.0.0, 0.3 (global constraint requires ==0.2)
trying: SourceGraph-0.2
trying: haskell-src-exts-1.16.0.1 (dependency of SourceGraph-0.2)
trying: cpphs-1.19.3 (dependency of haskell-src-exts-1.16.0.1)
trying: directory-1.2.2.0/installed-258... (dependency of cpphs-1.19.3)
next goal: Cabal (dependency of SourceGraph-0.2)
rejecting: Cabal-1.22.4.0/installed-43c..., 1.22.4.0, 1.22.3.0, 1.22.2.0,
1.22.1.1, 1.22.1.0, 1.22.0.0, 1.20.0.3, 1.20.0.2, 1.20.0.1, 1.20.0.0,
1.18.1.6, 1.18.1.5, 1.18.1.4, 1.18.1.3, 1.18.1.2, 1.18.1.1, 1.18.1, 1.18.0,
1.16.0.3, 1.16.0.2, 1.16.0.1, 1.16.0, 1.14.0, 1.12.0, 1.10.2.0, 1.10.1.0,
1.10.0.0, 1.8.0.6, 1.8.0.4, 1.8.0.2, 1.6.0.3, 1.6.0.2, 1.6.0.1 (conflict:
SourceGraph => Cabal<1.5)
rejecting: Cabal-1.4.0.2, 1.4.0.1, 1.4.0.0 (conflict: directory =>
filepath==1.4.0.0/installed-8fe..., Cabal => filepath>=1 && <1.2)
rejecting: Cabal-1.2.4.0, 1.2.3.0, 1.2.2.0, 1.2.1, 1.1.6 (conflict:
SourceGraph => Cabal>=1.4)
Backjump limit reached (change with --max-backjumps).