Resolving dependencies... cabal: Could not resolve dependencies: next goal: gi-pango (user goal) rejecting: gi-pango-1.0.6, gi-pango-1.0.5, gi-pango-1.0.4, gi-pango-1.0.3, gi-pango-1.0.2, gi-pango-1.0.1, gi-pango-0.1.38.15, gi-pango-0.1.38.14, gi-pango-0.1.38.13, gi-pango-0.1.38.12, gi-pango-0.1.36.12, gi-pango-0.1.38.10, gi-pango-0.1.36.11, gi-pango-0.1.36.10 (constraint from user target requires ==0.1.36.9) trying: gi-pango-0.1.36.9 next goal: gi-gobject (dependency of gi-pango-0.1.36.9) rejecting: gi-gobject-2.0.6, gi-gobject-2.0.5, gi-gobject-2.0.4, gi-gobject-2.0.3, gi-gobject-2.0.2, gi-gobject-2.0.1 (conflict: gi-pango => gi-gobject>=0.2.44.9 && <0.3) rejecting: gi-gobject-0.2.46.15, gi-gobject-0.2.46.14, gi-gobject-0.2.46.13, gi-gobject-0.2.46.12 (conflict: requires pkg-config package gobject-2.0>=2.46, not found in the pkg-config database) rejecting: gi-gobject-0.2.44.12 (conflict: requires pkg-config package gobject-2.0>=2.44, not found in the pkg-config database) rejecting: gi-gobject-0.2.46.10 (conflict: requires pkg-config package gobject-2.0>=2.46, not found in the pkg-config database) rejecting: gi-gobject-0.2.44.11, gi-gobject-0.2.44.10, gi-gobject-0.2.44.9 (conflict: requires pkg-config package gobject-2.0>=2.44, not found in the pkg-config database) rejecting: gi-gobject-0.2.44.8 (conflict: gi-pango => gi-gobject>=0.2.44.9 && <0.3) Dependency tree exhaustively searched.