Resolving dependencies... Error: cabal: Could not resolve dependencies: [__0] trying: Flint2-Examples-0.1.0.2 (user goal) [__1] next goal: Flint2 (dependency of Flint2-Examples) [__1] rejecting: Flint2-0.1.0.5, Flint2-0.1.0.4 (conflict: pkg-config package flint>=2.9, not found in the pkg-config database) [__1] rejecting: Flint2-0.1.0.3 (conflict: Flint2-Examples => Flint2>=0.1.0.4 && <0.2.0.0) [__1] skipping: Flint2-0.1.0.2, Flint2-0.1.0.1, Flint2-0.1.0.0 (has the same characteristics that caused the previous version to fail: excluded by constraint '>=0.1.0.4 && <0.2.0.0' from 'Flint2-Examples') [__1] fail (backjumping, conflict set: Flint2, Flint2-Examples) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: Flint2-Examples, Flint2