Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] trying: alsa-seq-0.6.0.8 (user goal)
[__1] rejecting: alsa-seq:+modifyfilter (conflict: pkg-config package
alsa==1.0.17 || >1.0.17, not found in the pkg-config database)
[__1] rejecting: alsa-seq:-modifyfilter (conflict: pkg-config package
alsa==1.0.14 || >1.0.14, not found in the pkg-config database)
[__1] fail (backjumping, conflict set: alsa-seq, alsa-seq:modifyfilter)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: alsa-seq, alsa-seq:modifyfilter