Resolving dependencies...
Error: cabal: Could not resolve dependencies:
[__0] next goal: singletons-th (user goal)
[__0] rejecting: singletons-th-3.5.1 (conflict: requires unknown language
GHC2024; did you mean GHC2021?)
[__0] rejecting: singletons-th-3.5, singletons-th-3.4, singletons-th-3.3,
singletons-th-3.2, singletons-th-3.1.1, singletons-th-3.1, singletons-th-3.0
(constraint from user target requires ==3.5.1)
[__0] fail (backjumping, conflict set: singletons-th)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: singletons-th