Resolving dependencies...
cabal: Could not resolve dependencies:
trying: llvm-ffi-3.2.1 (user goal)
trying: llvm-ffi-3.2.1:-buildtools
rejecting: llvm-ffi-3.2.1:+specificpkgconfig (conflict: requires pkg-config
package llvm-3.2==3.2, not found in the pkg-config database)
rejecting: llvm-ffi-3.2.1:-specificpkgconfig (conflict: requires pkg-config
package llvm==3.2, not found in the pkg-config database)
Dependency tree exhaustively searched.