Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] trying: ats-pkg-3.5.0.1 (user goal)
[__1] trying: archive-libarchive-1.0.0.0 (dependency of ats-pkg)
[__2] trying: libarchive-2.2.5.2 (dependency of archive-libarchive)
[__3] rejecting: libarchive:-static (conflict: pkg-config package
libarchive(==3.4.0 || >3.4.0) && <4.0, not found in the pkg-config database)
[__3] rejecting: libarchive:+static (manual flag can only be changed
explicitly)
[__3] fail (backjumping, conflict set: libarchive, libarchive:static)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: ats-pkg, archive-libarchive,
libarchive, libarchive:static
Try running with --minimize-conflict-set to improve the error message.