Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] trying: stack-2.7.5 (user goal)
[__1] next goal: unix (dependency of stack)
[__1] rejecting: unix-2.7.2.2/installed-2.7.2.2 (conflict: stack =>
bytestring>=0.10.12.0, unix => bytestring==0.10.10.0/installed-0.10.10.0)
[__1] trying: unix-2.7.2.2
[__2] trying: hpc-0.6.1.0/installed-0.6.1.0 (dependency of stack)
[__3] next goal: directory (dependency of stack)
[__3] rejecting: directory-1.3.6.0/installed-1.3.6.0 (conflict: unix==2.7.2.2,
directory => unix==2.7.2.2/installed-2.7.2.2)
[__3] rejecting: directory-1.3.7.0, directory-1.3.6.2, directory-1.3.6.1,
directory-1.3.6.0, directory-1.3.5.0, directory-1.3.4.0, directory-1.3.3.2,
directory-1.3.3.1, directory-1.3.3.0, directory-1.3.2.2, directory-1.3.2.1,
directory-1.3.2.0, directory-1.3.1.5, directory-1.3.1.4, directory-1.3.1.3,
directory-1.3.1.2, directory-1.3.1.1, directory-1.3.1.0, directory-1.3.0.2,
directory-1.3.0.1, directory-1.3.0.0, directory-1.2.7.1, directory-1.2.7.0,
directory-1.2.6.3, directory-1.2.6.2, directory-1.2.5.1, directory-1.2.5.0,
directory-1.2.4.0, directory-1.2.3.1, directory-1.2.3.0, directory-1.2.2.1,
directory-1.2.2.0, directory-1.2.1.0, directory-1.2.0.1, directory-1.2.0.0,
directory-1.1.0.2, directory-1.1.0.1, directory-1.1.0.0, directory-1.0.1.2,
directory-1.0.1.1, directory-1.0.1.0, directory-1.0.0.3, directory-1.0.0.0,
directory-1.2.6.1 (conflict: hpc => directory==1.3.6.0/installed-1.3.6.0)
[__3] fail (backjumping, conflict set: directory, hpc, stack, unix)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: stack, hpc, directory, unix
Try running with --minimize-conflict-set to improve the error message.