Resolving dependencies...
cabal: Could not resolve dependencies:
trying: gi-pango-1.0.16 (user goal)
next goal: haskell-gi (dependency of gi-pango-1.0.16)
rejecting: haskell-gi-0.20.3, haskell-gi-0.20.2, haskell-gi-0.20.1,
haskell-gi-0.20, haskell-gi-0.18, haskell-gi-0.17.4, haskell-gi-0.17.3,
haskell-gi-0.17.2, haskell-gi-0.17.1, haskell-gi-0.17, haskell-gi-0.15,
haskell-gi-0.14, haskell-gi-0.13, haskell-gi-0.12, haskell-gi-0.11,
haskell-gi-0.10.2, haskell-gi-0.10.1, haskell-gi-0.10, haskell-gi-0.9,
haskell-gi-0.8 (conflict: gi-pango => haskell-gi==0.21.*)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: gi-pango, haskell-gi