Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] trying: notifications-tray-icon-0.1.1.0 (user goal)
[__1] trying: gi-gio-2.0.28 (dependency of notifications-tray-icon)
[__2] trying: haskell-gi-base-0.25.0 (dependency of gi-gio)
[__3] next goal: haskell-gi (dependency of gi-gio)
[__3] rejecting: haskell-gi-0.25.0 (conflict: pkg-config package
gobject-introspection-1.0==1.32 || >1.32, not found in the pkg-config
database)
[__3] rejecting: haskell-gi-0.24.7 (conflict: gi-gio => haskell-gi>=0.25 &&
<0.26)
[__3] skipping: haskell-gi-0.24.6, haskell-gi-0.24.5, haskell-gi-0.24.4,
haskell-gi-0.24.3, haskell-gi-0.24.2, haskell-gi-0.24.1, haskell-gi-0.24.0,
haskell-gi-0.23.1, haskell-gi-0.23.0, haskell-gi-0.22.6, haskell-gi-0.22.5,
haskell-gi-0.22.4, haskell-gi-0.22.3, haskell-gi-0.22.2, haskell-gi-0.22.1,
haskell-gi-0.22.0, haskell-gi-0.21.5, haskell-gi-0.21.4, haskell-gi-0.21.3,
haskell-gi-0.21.2, 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 (has the same characteristics
that caused the previous version to fail: excluded by constraint '>=0.25 &&
<0.26' from 'gi-gio')
[__3] fail (backjumping, conflict set: gi-gio, haskell-gi)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: haskell-gi, haskell-gi-base, gi-gio,
gi-dbusmenu, notifications-tray-icon
Try running with --minimize-conflict-set to improve the error message.