Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: concrete-haskell (user goal)
rejecting: concrete-haskell-0.1.0.6 (constraint from user target requires
==0.1.0.5)
trying: concrete-haskell-0.1.0.5
trying: vector-0.12.0.1 (dependency of concrete-haskell-0.1.0.5)
next goal: thrift (dependency of concrete-haskell-0.1.0.5)
rejecting: thrift-0.10.0 (conflict: vector==0.12.0.1, thrift =>
vector==0.10.12.2)
rejecting: thrift-0.9.3, thrift-0.9.2, thrift-0.6.0 (conflict:
concrete-haskell => thrift==0.10.0)
Backjump limit reached (currently 2000, change with --max-backjumps or try to
run with --reorder-goals).