Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] trying: taffybar-2.1.2 (user goal)
[__1] next goal: haskell-gi (dependency of taffybar)
[__1] rejecting: haskell-gi-0.21.3, haskell-gi-0.21.2 (conflict: pkg-config
package gobject-introspection-1.0>=1.32, not found in the pkg-config database)
[__1] rejecting: haskell-gi-0.21.1, 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: taffybar =>
haskell-gi>=0.21.2)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: taffybar, haskell-gi