Resolving dependencies...
cabal: Could not resolve dependencies:
trying: concrete-haskell-0.1.0.4 (user goal)
trying: unordered-containers-0.2.7.1 (dependency of concrete-haskell-0.1.0.4)
next goal: thrift (dependency of concrete-haskell-0.1.0.4)
rejecting: thrift-0.9.3 (conflict: unordered-containers==0.2.7.1, thrift =>
unordered-containers<0.2.6.0)
rejecting: thrift-0.9.2, thrift-0.6.0 (conflict: concrete-haskell =>
thrift>=0.9.3)
Dependency tree exhaustively searched.