Resolving dependencies... cabal: Could not resolve dependencies: [__0] trying: monomer-1.0.0.1 (user goal) [__1] next goal: nanovg (dependency of monomer) [__1] rejecting: nanovg-0.6.0.0 (conflict: monomer => nanovg>=0.8 && <1.0) [__1] skipping: nanovg-0.5.2.0, nanovg-0.5.1.0, nanovg-0.5.0.0, nanovg-0.4.0.0, nanovg-0.3.0.0, nanovg-0.2.0.0, nanovg-0.1.0.2, nanovg-0.1.0.1, nanovg-0.1.0.0 (has the same characteristics that caused the previous version to fail: excluded by constraint '>=0.8 && <1.0' from 'monomer') [__1] fail (backjumping, conflict set: monomer, nanovg) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: monomer, nanovg