Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: language-ecmascript (user goal)
rejecting: language-ecmascript-0.17.0.1, 0.17, 0.16.2, 0.16.1, 0.16, 0.15.4
(global constraint requires ==0.15.3)
trying: language-ecmascript-0.15.3
trying: base-4.8.1.0/installed-4f7... (dependency of
language-ecmascript-0.15.3)
next goal: template-haskell (dependency of language-ecmascript-0.15.3)
rejecting: template-haskell-2.10.0.0/installed-90e..., 2.10.0.0, 2.9.0.0
(conflict: language-ecmascript => template-haskell>=2.8 && <2.9)
rejecting: template-haskell-2.8.0.0 (conflict: base==4.8.1.0/installed-4f7...,
template-haskell => base==4.6.*)
rejecting: template-haskell-2.7.0.0, 2.6.0.0, 2.5.0.0, 2.4.0.1, 2.4.0.0,
2.3.0.1, 2.3.0.0, 2.2.0.0 (conflict: language-ecmascript =>
template-haskell>=2.8 && <2.9)
Dependency tree exhaustively searched.