I cannot build Rhapsode on GHC 9.4.7 on my Alpine Linux machine. There appears to be a conflict between aeson-1.5 and newer GHC versions.

$ cabal run Resolving dependencies... Error: cabal: Could not resolve dependencies: [__0] trying: rhapsode-0.5.0.0 (user goal) [__1] trying: base-4.17.2.0/installed-4.17.2.0 (dependency of rhapsode) [__2] next goal: aeson (dependency of rhapsode) [__2] rejecting: aeson-2.2.1.0 (conflict: rhapsode => aeson>=1.5 && <1.6) [__2] skipping: aeson-2.2.0.0, aeson-2.1.2.1, aeson-2.1.2.0, aeson-2.1.1.0, aeson-2.1.0.0, aeson-2.0.3.0, aeson-2.0.2.0, aeson-2.0.1.0, aeson-2.0.0.0 (has the same characteristics that caused the previous version to fail: excluded by constraint '>=1.5 && <1.6' from 'rhapsode') [__2] rejecting: aeson-1.5.6.0, aeson-1.5.5.1 (conflict: base => ghc-prim==0.9.1/installed-0.9.1, aeson => ghc-prim>=0.2 && <0.8) [__2] rejecting: aeson-1.5.5.0 (conflict: base==4.17.2.0/installed-4.17.2.0, aeson => base(>=4.7.0.0 && <5) && <0) [__2] rejecting: aeson-1.5.4.1, aeson-1.5.4.0 (conflict: base => ghc-prim==0.9.1/installed-0.9.1, aeson => ghc-prim>=0.2 && <0.8) [__2] rejecting: aeson-1.5.3.0, aeson-1.5.2.0, aeson-1.5.1.0, aeson-1.5.0.0 (conflict: base => ghc-prim==0.9.1/installed-0.9.1, aeson => ghc-prim>=0.2 && <0.7) [__2] rejecting: aeson-1.4.7.1 (conflict: rhapsode => aeson>=1.5 && <1.6) [__2] skipping: aeson-1.4.7.0, aeson-1.4.6.0, aeson-1.4.5.0, aeson-1.4.4.0, aeson-1.4.3.0, aeson-1.4.2.0, aeson-1.4.1.0, aeson-1.4.0.0, aeson-1.3.1.1, aeson-1.3.1.0, aeson-1.3.0.0, aeson-1.2.4.0, aeson-1.2.3.0, aeson-1.2.2.0, aeson-1.2.1.0, aeson-1.2.0.0, aeson-1.1.2.0, aeson-1.1.1.0, aeson-1.1.0.0, aeson-1.0.2.1, aeson-1.0.2.0, aeson-1.0.1.0, aeson-1.0.0.0, aeson-0.11.3.0, aeson-0.11.2.1, aeson-0.11.2.0, aeson-0.11.1.4, aeson-0.11.1.3, aeson-0.11.1.2, aeson-0.11.1.1, aeson-0.11.1.0, aeson-0.11.0.0, aeson-0.9.0.1, aeson-0.9.0.0, aeson-0.8.1.1, aeson-0.8.1.0, aeson-0.8.0.2, aeson-0.7.0.6, aeson-0.7.0.4, aeson-0.6.2.1, aeson-0.6.2.0, aeson-0.6.1.0, aeson-0.6.0.2, aeson-0.6.0.1, aeson-0.6.0.0, aeson-0.5.0.0, aeson-0.4.0.1, aeson-0.4.0.0, aeson-0.3.2.14, aeson-0.3.2.13, aeson-0.3.2.12, aeson-0.3.2.11, aeson-0.3.2.10, aeson-0.3.2.9, aeson-0.3.2.8, aeson-0.3.2.7, aeson-0.3.2.6, aeson-0.3.2.5, aeson-0.3.2.4, aeson-0.3.2.3, aeson-0.3.2.2, aeson-0.3.2.1, aeson-0.3.2.0, aeson-0.3.1.1, aeson-0.3.1.0, aeson-0.3.0.0, aeson-0.2.0.0, aeson-0.1.0.0, aeson-0.10.0.0, aeson-0.8.0.1, aeson-0.8.0.0, aeson-0.7.0.5, aeson-0.7.0.3, aeson-0.7.0.2, aeson-0.7.0.1, aeson-0.7.0.0 (has the same characteristics that caused the previous version to fail: excluded by constraint '>=1.5 && <1.6' from 'rhapsode') [__2] fail (backjumping, conflict set: aeson, base, rhapsode) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: aeson, rhapsode, base