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 (constraint from
user target requires ==0.1.38.10)
rejecting: gi-pango-0.1.38.10 (conflict: requires pkg-config package
pango>=1.38, not found in the pkg-config database)
rejecting: gi-pango-0.1.36.11, gi-pango-0.1.36.10, gi-pango-0.1.36.9,
gi-pango-0.1.36.8 (constraint from user target requires ==0.1.38.10)
Dependency tree exhaustively searched.