Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: scan-vector-machine (user goal)
rejecting: scan-vector-machine-0.2.7, scan-vector-machine-0.2.6,
scan-vector-machine-0.2.5, scan-vector-machine-0.2.4,
scan-vector-machine-0.2.3, scan-vector-machine-0.2.2 (constraint from user
target requires ==0.2.1)
trying: scan-vector-machine-0.2.1
trying: base-4.9.0.0/installed-4.9... (dependency of accelerate-0.15.1.0)
next goal: haskell2010 (dependency of scan-vector-machine-0.2.1)
rejecting: haskell2010-1.1.2.0 (conflict: base==4.9.0.0/installed-4.9...,
haskell2010 => base>=4.7 && <4.8)
rejecting: haskell2010-1.1.1.0 (conflict: base==4.9.0.0/installed-4.9...,
haskell2010 => base==4.6.*)
rejecting: haskell2010-1.1.0.1, haskell2010-1.1.0.0 (conflict:
base==4.9.0.0/installed-4.9..., haskell2010 => base>=4.3 && <4.7)
rejecting: haskell2010-1.0.0.0 (conflict: base==4.9.0.0/installed-4.9...,
haskell2010 => base>=4.3 && <4.6)
Dependency tree exhaustively searched.