Resolving dependencies... Error: cabal: Could not resolve dependencies: [__0] trying: svgone-0.2.0.2 (user goal) [__1] trying: reanimate-svg-0.13.0.1 (dependency of svgone) [__2] next goal: transformers (dependency of reanimate-svg) [__2] rejecting: transformers-0.6.1.0/installed-0.6.1.0 (conflict: reanimate-svg => transformers>=0.3 && <0.6) [__2] skipping: transformers-0.6.1.2, transformers-0.6.1.1, transformers-0.6.1.0, transformers-0.6.0.6, transformers-0.6.0.2 (has the same characteristics that caused the previous version to fail: excluded by constraint '>=0.3 && <0.6' from 'reanimate-svg') [__2] trying: transformers-0.5.6.2 [__3] trying: linear-1.23 (dependency of svgone) [__4] next goal: semigroupoids (dependency of linear) [__4] rejecting: semigroupoids-6.0.1 (conflict: transformers==0.5.6.2, semigroupoids => transformers>=0.6.1.0 && <0.7) [__4] skipping: semigroupoids-6.0.0.1 (has the same characteristics that caused the previous version to fail: excludes 'transformers' version 0.5.6.2) [__4] trying: semigroupoids-5.3.7 [__5] next goal: base (dependency of svgone) [__5] rejecting: base-4.18.1.0/installed-4.18.1.0 (conflict: semigroupoids => base>=4.3 && <4.18) [__5] skipping: base-4.20.0.1, base-4.20.0.0, base-4.19.2.0, base-4.19.1.0, base-4.19.0.0, base-4.18.2.1, base-4.18.2.0, base-4.18.1.0, base-4.18.0.0 (has the same characteristics that caused the previous version to fail: excluded by constraint '>=4.3 && <4.18' from 'semigroupoids') [__5] rejecting: base-4.17.2.1, base-4.17.2.0, base-4.17.1.0, base-4.17.0.0, base-4.16.4.0, base-4.16.3.0, base-4.16.2.0, base-4.16.1.0, base-4.16.0.0, base-4.15.1.0, base-4.15.0.0, base-4.14.3.0, base-4.14.2.0, base-4.14.1.0, base-4.14.0.0, base-4.13.0.0, base-4.12.0.0, base-4.11.1.0, base-4.11.0.0, base-4.10.1.0, base-4.10.0.0, base-4.9.1.0, base-4.9.0.0, base-4.8.2.0, base-4.8.1.0, base-4.8.0.0, base-4.7.0.2, base-4.7.0.1, base-4.7.0.0, base-4.6.0.1, base-4.6.0.0, base-4.5.1.0, base-4.5.0.0, base-4.4.1.0, base-4.4.0.0, base-4.3.1.0, base-4.3.0.0, base-4.2.0.2, base-4.2.0.1, base-4.2.0.0, base-4.1.0.0, base-4.0.0.0, base-3.0.3.2, base-3.0.3.1 (constraint from non-upgradeable package requires installed instance) [__5] fail (backjumping, conflict set: base, semigroupoids, svgone) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: linear, base, semigroupoids, svgone, transformers, reanimate-svg Try running with --minimize-conflict-set to improve the error message.