Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: SourceGraph (user goal)
rejecting: SourceGraph-0.7.0.7, SourceGraph-0.7.0.6, SourceGraph-0.7.0.5,
SourceGraph-0.7.0.4, SourceGraph-0.7.0.3, SourceGraph-0.7.0.2,
SourceGraph-0.7.0.1, SourceGraph-0.7.0.0, SourceGraph-0.6.1.1,
SourceGraph-0.6.0.2, SourceGraph-0.6.0.1, SourceGraph-0.6.0.0,
SourceGraph-0.5.5.0, SourceGraph-0.5.2.0 (constraint from user target requires
==0.5.1.0)
trying: SourceGraph-0.5.1.0
trying: base-4.9.0.0/installed-4.9... (dependency of SourceGraph-0.5.1.0)
next goal: haskell-src-exts (dependency of SourceGraph-0.5.1.0)
rejecting: haskell-src-exts-1.19.1, haskell-src-exts-1.19.0,
haskell-src-exts-1.18.2, haskell-src-exts-1.18.1, haskell-src-exts-1.18.0,
haskell-src-exts-1.17.1, haskell-src-exts-1.17.0, haskell-src-exts-1.16.0.1,
haskell-src-exts-1.16.0, haskell-src-exts-1.15.0.1, haskell-src-exts-1.15.0,
haskell-src-exts-1.14.0.1, haskell-src-exts-1.14.0, haskell-src-exts-1.13.5,
haskell-src-exts-1.13.4, haskell-src-exts-1.13.3, haskell-src-exts-1.13.2,
haskell-src-exts-1.13.1, haskell-src-exts-1.13.0, haskell-src-exts-1.12.0,
haskell-src-exts-1.11.1, haskell-src-exts-1.10.2, haskell-src-exts-1.10.1,
haskell-src-exts-1.10.0, haskell-src-exts-1.9.6, haskell-src-exts-1.9.5,
haskell-src-exts-1.9.4, haskell-src-exts-1.9.3, haskell-src-exts-1.9.0,
haskell-src-exts-1.8.2, haskell-src-exts-1.8.1, haskell-src-exts-1.8.0,
haskell-src-exts-1.7.2, haskell-src-exts-1.7.1, haskell-src-exts-1.7.0,
haskell-src-exts-1.6.1, haskell-src-exts-1.6.0, haskell-src-exts-1.5.3,
haskell-src-exts-1.5.2, haskell-src-exts-1.5.1, haskell-src-exts-1.5.0,
haskell-src-exts-1.4.0, haskell-src-exts-1.3.5, haskell-src-exts-1.3.4,
haskell-src-exts-1.3.3, haskell-src-exts-1.3.2, haskell-src-exts-1.3.1,
haskell-src-exts-1.3.0, haskell-src-exts-1.2.0 (conflict: SourceGraph =>
haskell-src-exts>=1.1.0 && <1.2.0)
rejecting: haskell-src-exts-1.1.4, haskell-src-exts-1.1.3.1 (conflict:
base==4.9.0.0/installed-4.9..., haskell-src-exts => base>=4 && <4.8 || >=3 &&
<4)
rejecting: haskell-src-exts-1.1.3 (conflict: base==4.9.0.0/installed-4.9...,
haskell-src-exts => base>=4 && <0 || >=3 && <0)
rejecting: haskell-src-exts-1.1.1, haskell-src-exts-1.1.0 (conflict:
base==4.9.0.0/installed-4.9..., haskell-src-exts => base>=4 && <4.8 || >=3 &&
<4)
rejecting: haskell-src-exts-1.0.1, haskell-src-exts-1.0.0,
haskell-src-exts-0.5.7, haskell-src-exts-0.5.6, haskell-src-exts-0.5.5,
haskell-src-exts-0.5.4, haskell-src-exts-0.5.3, haskell-src-exts-0.5.2,
haskell-src-exts-0.4.8, haskell-src-exts-0.4.6, haskell-src-exts-0.4.5,
haskell-src-exts-0.4.4.1, haskell-src-exts-0.4.4, haskell-src-exts-0.4.3.1,
haskell-src-exts-0.4.3, haskell-src-exts-0.4.2, haskell-src-exts-0.4.1,
haskell-src-exts-0.3.12, haskell-src-exts-0.3.11, haskell-src-exts-0.3.10,
haskell-src-exts-0.3.9, haskell-src-exts-0.3.7, haskell-src-exts-0.3.5,
haskell-src-exts-0.3.4, haskell-src-exts-0.3.3, haskell-src-exts-0.3.2,
haskell-src-exts-0.2.1 (conflict: SourceGraph => haskell-src-exts>=1.1.0 &&
<1.2.0)
Dependency tree exhaustively searched.