Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: hfiar (user goal)
rejecting: hfiar-2.1.1, 2.0.4, 2.0.3, 2.0.2, 2.0.1, 2.0.0, 1.2.0, 1.0.1,
1.0.0, 0.1.2, 0.1.1, 0.1.0 (global constraint requires ==0.0.1)
trying: hfiar-0.0.1
trying: eprocess-1.7.0 (dependency of hfiar-0.0.1)
next goal: mtl (dependency of hfiar-0.0.1)
rejecting: mtl-2.2.1, 2.2.0.1, 2.2, 2.1.3.1, 2.1.2, 2.1.1, 2.1, 2.0.1.1,
2.0.1.0, 2.0.0.0 (conflict: hfiar => mtl<1.2)
rejecting: mtl-1.1.1.1, 1.1.1.0, 1.1.0.2, 1.1.0.1, 1.1.0.0 (conflict: eprocess
=> mtl==2.1.*)
rejecting: mtl-1.0 (conflict: hfiar => mtl>=1.1.0)
Dependency tree exhaustively searched.