Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: happy-meta (user goal)
rejecting: happy-meta-0.2.0.8, 0.2.0.7, 0.2.0.6, 0.2.0.5, 0.2.0.4, 0.2.0.3,
0.2.0.2, 0.2.0.1, 0.2 (global constraint requires ==0.1.1)
trying: happy-meta-0.1.1
trying: base-4.8.1.0/installed-4f7... (dependency of happy-meta-0.1.1)
next goal: haskell-src-meta (dependency of happy-meta-0.1.1)
rejecting: haskell-src-meta-0.6.0.11, 0.6.0.10, 0.6.0.9, 0.6.0.8, 0.6.0.7,
0.6.0.6, 0.6.0.5, 0.6.0.4, 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, 0.4.0.2, 0.4.0.1, 0.4, 0.3, 0.2 (conflict:
happy-meta => haskell-src-meta>=0.1.1 && <0.2)
rejecting: haskell-src-meta-0.1.1 (conflict: base==4.8.1.0/installed-4f7...,
haskell-src-meta => base==4.2.*)
rejecting: haskell-src-meta-0.1.0, 0.0.6, 0.0.5, 0.0.4, 0.0.3.1, 0.0.3, 0.0.2,
0.0.1, 0.0.0 (conflict: happy-meta => haskell-src-meta>=0.1.1 && <0.2)
Dependency tree exhaustively searched.