Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] trying: reactive-banana-gi-gtk-0.4.0.1 (user goal)
[__1] trying: gi-gtk-3.0.23 (dependency of reactive-banana-gi-gtk)
[__2] next goal: haskell-gi (dependency of gi-gtk)
[__2] rejecting: haskell-gi-0.21.3, haskell-gi-0.21.2, haskell-gi-0.21.1
(conflict: pkg-config package gobject-introspection-1.0>=1.32, not found in
the pkg-config database)
[__2] rejecting: haskell-gi-0.21.0, 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-gtk => haskell-gi>=0.21.1 &&
<0.22)
Backjump limit reached (currently 2000, change with --max-backjumps or try to
run with --reorder-goals).