Resolving dependencies...
Error: cabal: Could not resolve dependencies:
[__0] trying: diagrams-gi-cairo-1.5 (user goal)
[__1] trying: gi-pangocairo-1.0.31 (dependency of diagrams-gi-cairo)
[__2] next goal: haskell-gi-base (dependency of gi-pangocairo)
[__2] rejecting: haskell-gi-base-0.26.8, haskell-gi-base-0.26.7,
haskell-gi-base-0.26.6, haskell-gi-base-0.26.5, haskell-gi-base-0.26.4,
haskell-gi-base-0.26.3, haskell-gi-base-0.26.2, haskell-gi-base-0.26.1,
haskell-gi-base-0.26.0 (conflict: pkg-config package glib-2.0-any, not found
in the pkg-config database)
[__2] rejecting: haskell-gi-base-0.25.0 (conflict: gi-pangocairo =>
haskell-gi-base>=0.26 && <0.27)
[__2] skipping: haskell-gi-base-0.24.5, haskell-gi-base-0.24.4,
haskell-gi-base-0.24.3, haskell-gi-base-0.24.2, haskell-gi-base-0.24.1,
haskell-gi-base-0.24.0, haskell-gi-base-0.23.0, haskell-gi-base-0.22.2,
haskell-gi-base-0.22.1, haskell-gi-base-0.22.0, haskell-gi-base-0.21.5,
haskell-gi-base-0.21.4, haskell-gi-base-0.21.3, haskell-gi-base-0.21.2,
haskell-gi-base-0.21.1, haskell-gi-base-0.21.0, haskell-gi-base-0.20.8,
haskell-gi-base-0.20.4, haskell-gi-base-0.20.3, haskell-gi-base-0.20.2,
haskell-gi-base-0.20.1, haskell-gi-base-0.20, haskell-gi-base-0.18.4,
haskell-gi-base-0.18.3, haskell-gi-base-0.18.2, haskell-gi-base-0.18.1,
haskell-gi-base-0.18, haskell-gi-base-0.17, haskell-gi-base-0.15,
haskell-gi-base-0.14, haskell-gi-base-0.13, haskell-gi-base-0.12,
haskell-gi-base-0.11, haskell-gi-base-0.10.1, haskell-gi-base-0.10,
haskell-gi-base-0.9, haskell-gi-base-0.8, haskell-gi-base-0.20.7,
haskell-gi-base-0.20.6, haskell-gi-base-0.20.5, haskell-gi-base-0.19,
haskell-gi-base-0.16 (has the same characteristics that caused the previous
version to fail: excluded by constraint '>=0.26 && <0.27' from
'gi-pangocairo')
[__2] fail (backjumping, conflict set: gi-pangocairo, haskell-gi-base)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: haskell-gi-base, gi-pangocairo, base,
diagrams-gi-cairo
Try running with --minimize-conflict-set to improve the error message.