Resolving dependencies... cabal: Could not resolve dependencies: next goal: elm-reactor (user goal) rejecting: elm-reactor-0.3.1 (constraint from user target requires ==0.3) trying: elm-reactor-0.3 trying: binary-0.8.3.0/installed-0.8... (dependency of scientific-0.3.4.9) next goal: elm-compiler (dependency of elm-reactor-0.3) rejecting: elm-compiler-0.15 (conflict: elm-reactor => elm-compiler>=0.14.1 && <0.15) rejecting: elm-compiler-0.14.1 (conflict: binary==0.8.3.0/installed-0.8..., elm-compiler => binary>=0.7.0.0 && <0.8) rejecting: elm-compiler-0.14 (conflict: elm-reactor => elm-compiler>=0.14.1 && <0.15) Backjump limit reached (currently 2000, change with --max-backjumps or try to run with --reorder-goals).