Resolving dependencies... Error: cabal: Could not resolve dependencies: [__0] trying: LPFP-1.0 (user goal) [__1] trying: diagrams-cairo-1.4.2 (dependency of LPFP) [__2] next goal: pango (dependency of diagrams-cairo) [__2] rejecting: pango-0.13.8.2, pango-0.13.8.1, pango-0.13.8.0, pango-0.13.6.1, pango-0.13.6.0, pango-0.13.5.0, pango-0.13.4.0, pango-0.13.3.1, pango-0.13.3.0, pango-0.13.2.0, pango-0.13.1.1, pango-0.13.1.0, pango-0.13.0.5, pango-0.13.0.4, pango-0.13.0.3, pango-0.13.0.2, pango-0.13.0.1, pango-0.13.0.0, pango-0.12.5.3, pango-0.12.5.0 (conflict: pkg-config package pango>=1.0, not found in the pkg-config database) [__2] rejecting: pango-0.12.4 (conflict: diagrams-cairo => pango>=0.12.5 && <0.14) [__2] skipping: pango-0.12.3, pango-0.12.2, pango-0.12.1, pango-0.12.0, pango-0.11.2, pango-0.11.1, pango-0.11.0 (has the same characteristics that caused the previous version to fail: excluded by constraint '>=0.12.5 && <0.14' from 'diagrams-cairo') [__2] fail (backjumping, conflict set: diagrams-cairo, pango) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: pango, diagrams-cairo, base, LPFP Try running with --minimize-conflict-set to improve the error message.