Resolving dependencies...
cabal: Could not resolve dependencies:
trying: base-4.9.0.0/installed-4.9... (dependency of happstack-server-7.4.6)
trying: happstack-server-7.4.6:+template_haskell
next goal: template-haskell (dependency of
happstack-server-7.4.6:+template_haskell)
rejecting: template-haskell-2.11.0.0/installed-2.1...,
template-haskell-2.11.0.0 (conflict: happstack-server-7.4.6:template_haskell
=> template-haskell<2.11)
rejecting: template-haskell-2.10.0.0 (conflict:
base==4.9.0.0/installed-4.9..., template-haskell => base==4.8.*)
rejecting: template-haskell-2.9.0.0 (conflict: base==4.9.0.0/installed-4.9...,
template-haskell => base==4.7.*)
rejecting: template-haskell-2.8.0.0 (conflict: base==4.9.0.0/installed-4.9...,
template-haskell => base==4.6.*)
rejecting: template-haskell-2.7.0.0 (conflict: base==4.9.0.0/installed-4.9...,
template-haskell => base==4.5.*)
rejecting: template-haskell-2.6.0.0 (conflict: base==4.9.0.0/installed-4.9...,
template-haskell => base==4.4.*)
rejecting: template-haskell-2.5.0.0 (conflict: base==4.9.0.0/installed-4.9...,
template-haskell => base==4.3.*)
rejecting: template-haskell-2.4.0.1 (conflict: base==4.9.0.0/installed-4.9...,
template-haskell => base==4.2.*)
rejecting: template-haskell-2.4.0.0 (conflict: base==4.9.0.0/installed-4.9...,
template-haskell => base>=3 && <4.3)
rejecting: template-haskell-2.3.0.1, template-haskell-2.3.0.0,
template-haskell-2.2.0.0 (conflict: base==4.9.0.0/installed-4.9...,
template-haskell => base<4.3)
Dependency tree exhaustively searched.