Resolving dependencies...
cabal: Could not resolve dependencies:
trying: lapack-0.0 (user goal)
next goal: blas-ffi (dependency of lapack-0.0)
rejecting: blas-ffi-0.0.1, blas-ffi-0.0 (conflict: requires pkg-config package
blas-any, not found in the pkg-config database)
fail (backjumping, conflict set: blas-ffi, lapack)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: lapack, blas-ffi