Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: derive-trie (user goal)
rejecting: derive-trie-0.2.1, 0.2 (global constraint requires ==0.1.0)
trying: derive-trie-0.1.0
trying: base-4.8.1.0/installed-4f7... (dependency of derive-trie-0.1.0)
next goal: template-haskell (dependency of derive-trie-0.1.0)
rejecting: template-haskell-2.10.0.0/installed-90e..., 2.10.0.0, 2.9.0.0,
2.8.0.0, 2.7.0.0, 2.6.0.0, 2.5.0.0 (conflict: derive-trie =>
template-haskell==2.4.*)
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: derive-trie
=> template-haskell==2.4.*)
Dependency tree exhaustively searched.