Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: tighttp (user goal)
rejecting: tighttp-0.0.0.9, 0.0.0.8, 0.0.0.7, 0.0.0.6, 0.0.0.5, 0.0.0.3,
0.0.0.2, 0.0.0.1, 0.0.0.0 (global constraint requires ==0.0.0.4)
trying: tighttp-0.0.0.4
trying: base-4.8.1.0/installed-4f7... (dependency of tighttp-0.0.0.4)
trying: papillon-0.1.0.2 (dependency of tighttp-0.0.0.4)
next goal: template-haskell (dependency of papillon-0.1.0.2)
rejecting: template-haskell-2.10.0.0/installed-90e..., 2.10.0.0 (conflict:
papillon => template-haskell==2.9.*)
rejecting: template-haskell-2.9.0.0 (conflict: base==4.8.1.0/installed-4f7...,
template-haskell => base==4.7.*)
rejecting: template-haskell-2.8.0.0, 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: papillon =>
template-haskell==2.9.*)
Backjump limit reached (change with --max-backjumps).