Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: bumper (user goal)
rejecting: bumper-0.6.0.3, 0.6.0.2, 0.6.0.1, 0.6, 0.5.1.2, 0.5.1.1, 0.5.1,
0.5.0.3, 0.5.0.2, 0.5.0.1 (global constraint requires ==0.5)
trying: bumper-0.5
trying: base-4.8.1.0/installed-4f7... (dependency of bumper-0.5)
next goal: fclabels (dependency of bumper-0.5)
rejecting: fclabels-2.0.2.3, 2.0.2.2, 2.0.2.1, 2.0.2, 2.0.1.1, 2.0.1, 2.0.0.5,
2.0.0.4, 2.0.0.3, 2.0.0.2, 2.0.0.1, 2.0 (conflict: bumper => fclabels>=1.0 &&
<1.2)
trying: fclabels-1.1.7.1
next goal: template-haskell (dependency of fclabels-1.1.7.1)
rejecting: template-haskell-2.10.0.0/installed-90e..., 2.10.0.0, 2.9.0.0
(conflict: fclabels => template-haskell>=2.2 && <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 (conflict: base==4.8.1.0/installed-4f7...,
template-haskell => base==4.5.*)
rejecting: template-haskell-2.6.0.0 (conflict: base==4.8.1.0/installed-4f7...,
template-haskell => base==4.4.*)
rejecting: template-haskell-2.5.0.0 (conflict: base==4.8.1.0/installed-4f7...,
template-haskell => base==4.3.*)
rejecting: template-haskell-2.4.0.1 (conflict: base==4.8.1.0/installed-4f7...,
template-haskell => base==4.2.*)
rejecting: template-haskell-2.4.0.0 (conflict: base==4.8.1.0/installed-4f7...,
template-haskell => base>=3 && <4.3)
rejecting: template-haskell-2.3.0.1, 2.3.0.0, 2.2.0.0 (conflict:
base==4.8.1.0/installed-4f7..., template-haskell => base<4.3)
Dependency tree exhaustively searched.