Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: manatee-imageviewer (user goal)
rejecting: manatee-imageviewer-0.1.1, manatee-imageviewer-0.1.0,
manatee-imageviewer-0.0.8, manatee-imageviewer-0.0.7,
manatee-imageviewer-0.0.6, manatee-imageviewer-0.0.5 (constraint from user
target requires ==0.0.4)
trying: manatee-imageviewer-0.0.4
next goal: gtkimageview (dependency of manatee-imageviewer-0.0.4)
rejecting: gtkimageview-0.12.0 (conflict: requires pkg-config package
gtkimageview>=1.6.1, not found in the pkg-config database)
rejecting: gtkimageview-0.11.1 (conflict: manatee-imageviewer =>
gtkimageview>=0.12.0)
Dependency tree exhaustively searched.