Resolving dependencies... cabal: Could not resolve dependencies: next goal: jsaddle-hello (user goal) rejecting: jsaddle-hello-2.0.0.0 (constraint from user target requires ==1.0.0.0) trying: jsaddle-hello-1.0.0.0 trying: lens-4.15.1 (dependency of jsaddle-hello-1.0.0.0) next goal: jsaddle (dependency of jsaddle-hello-1.0.0.0) rejecting: jsaddle-0.7.0.0, jsaddle-0.6.0.1, jsaddle-0.6.0.0, jsaddle-0.5.2.0, jsaddle-0.5.1.1, jsaddle-0.5.1.0, jsaddle-0.5.0.2, jsaddle-0.5.0.1, jsaddle-0.5.0.0, jsaddle-0.4.0.5, jsaddle-0.4.0.4, jsaddle-0.4.0.3, jsaddle-0.4.0.2, jsaddle-0.4.0.1, jsaddle-0.3.0.3, jsaddle-0.3.0.2, jsaddle-0.3.0.1, jsaddle-0.3.0.0, jsaddle-0.2.1.0, jsaddle-0.2.0.6, jsaddle-0.2.0.5, jsaddle-0.2.0.4, jsaddle-0.2.0.3, jsaddle-0.2.0.2, jsaddle-0.2.0.1, jsaddle-0.2.0.0 (conflict: jsaddle-hello => jsaddle>=0.1.1.4 && <0.2) rejecting: jsaddle-0.1.1.7, jsaddle-0.1.1.6, jsaddle-0.1.1.5 (conflict: lens==4.15.1, jsaddle => lens>=3.8.5 && <4.3) rejecting: jsaddle-0.1.1.4 (conflict: lens==4.15.1, jsaddle => lens>=3.8.5 && <4.1) rejecting: jsaddle-0.1.1.3 (conflict: jsaddle-hello => jsaddle>=0.1.1.4 && <0.2) Dependency tree exhaustively searched.