Resolving dependencies... Error: cabal: Could not resolve dependencies: [__0] trying: ostree-pin-0.1.1 (user goal) [__1] next goal: gi-ostree (dependency of ostree-pin) [__1] rejecting: gi-ostree-1.0.18 (conflict: pkg-config package ostree-1-any, not found in the pkg-config database) [__1] rejecting: gi-ostree-1.0.16 (conflict: ostree-pin => gi-ostree>=1.0.18) [__1] skipping: gi-ostree-1.0.15, gi-ostree-1.0.14, gi-ostree-1.0.13, gi-ostree-1.0.12, gi-ostree-1.0.11, gi-ostree-1.0.10, gi-ostree-1.0.9, gi-ostree-1.0.8, gi-ostree-1.0.6, gi-ostree-1.0.5, gi-ostree-1.0.4, gi-ostree-1.0.3, gi-ostree-1.0.2, gi-ostree-1.0.1 (has the same characteristics that caused the previous version to fail: excluded by constraint '>=1.0.18' from 'ostree-pin') [__1] fail (backjumping, conflict set: gi-ostree, ostree-pin) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: gi-ostree, ostree-pin