Resolving dependencies... Error: cabal: Could not resolve dependencies: [__0] trying: aws-spend-summary-0.3.0.1 (user goal) [__1] trying: base-4.19.2.0/installed-inplace (dependency of aws-spend-summary) [__2] next goal: amazonka-s3 (dependency of aws-spend-summary) [__2] rejecting: amazonka-s3-2.0 (conflict: base==4.19.2.0/installed-inplace, amazonka-s3 => base>=4.12 && <4.19) [__2] skipping: amazonka-s3-1.6.1, amazonka-s3-1.6.0, amazonka-s3-1.5.0, amazonka-s3-1.4.5, amazonka-s3-1.4.4, amazonka-s3-1.4.3, amazonka-s3-1.4.2, amazonka-s3-1.4.1, amazonka-s3-1.4.0, amazonka-s3-1.3.7, amazonka-s3-1.3.6, amazonka-s3-1.3.5, amazonka-s3-1.3.4, amazonka-s3-1.3.3.1, amazonka-s3-1.3.3, amazonka-s3-1.3.2, amazonka-s3-1.3.1, amazonka-s3-1.3.0, amazonka-s3-1.2.0.2, amazonka-s3-1.2.0.1, amazonka-s3-1.2.0, amazonka-s3-1.1.0, amazonka-s3-1.0.1, amazonka-s3-1.0.0, amazonka-s3-0.3.6, amazonka-s3-0.3.5, amazonka-s3-0.3.4, amazonka-s3-0.3.3, amazonka-s3-0.3.2, amazonka-s3-0.3.1, amazonka-s3-0.3.0, amazonka-s3-0.2.3, amazonka-s3-0.2.2, amazonka-s3-0.2.1, amazonka-s3-0.2.0, amazonka-s3-0.1.4, amazonka-s3-0.1.3, amazonka-s3-0.1.2, amazonka-s3-0.1.1, amazonka-s3-0.1.0, amazonka-s3-0.0.8, amazonka-s3-0.0.7, amazonka-s3-0.0.6, amazonka-s3-0.0.5, amazonka-s3-0.0.4, amazonka-s3-0.0.3, amazonka-s3-0.0.2, amazonka-s3-0.0.1, amazonka-s3-0.0.0 (has the same characteristics that caused the previous version to fail: excludes 'base' version 4.19.2.0) [__2] fail (backjumping, conflict set: amazonka-s3, aws-spend-summary, base) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: base, amazonka-s3, aws-spend-summary