Resolving dependencies...
Error: cabal: Could not resolve dependencies:
[__0] next goal: Z-IO (user goal)
[__0] rejecting: Z-IO-2.0.0.0 (constraint from user target requires ==1.0.2.0)
[__0] trying: Z-IO-1.0.2.0
[__1] trying: base-4.16.3.0/installed-4.16.3.0 (dependency of Z-IO)
[__2] next goal: Z-Data (dependency of Z-IO)
[__2] rejecting: Z-Data-2.0.0.1 (conflict: Z-IO => Z-Data^>=1.3)
[__2] rejecting: Z-Data-1.3.0.1 (conflict: base =>
ghc-prim==0.8.0/installed-0.8.0, Z-Data => ghc-prim>=0.5.3 && <0.8)
[__2] rejecting: Z-Data-1.2.1.0 (conflict: Z-IO => Z-Data^>=1.3)
[__2] skipping: Z-Data-1.2.0.0, Z-Data-1.1.0.0, Z-Data-1.0.0.1,
Z-Data-1.0.0.0, Z-Data-0.9.0.0, Z-Data-0.8.8.0, Z-Data-0.8.6.1,
Z-Data-0.7.4.0, Z-Data-0.7.3.0, Z-Data-0.7.2.0, Z-Data-0.7.1.0,
Z-Data-0.7.0.0, Z-Data-0.6.1.0, Z-Data-0.6.0.0, Z-Data-0.5.0.0,
Z-Data-0.4.0.0, Z-Data-0.3.0.0, Z-Data-0.2.0.0, Z-Data-0.1.9.1,
Z-Data-0.1.8.0, Z-Data-0.1.7.2, Z-Data-0.1.7.1, Z-Data-0.1.7.0,
Z-Data-0.1.6.1, Z-Data-0.1.6.0, Z-Data-0.1.5.0, Z-Data-0.1.4.2,
Z-Data-0.1.4.1, Z-Data-0.1.4.0, Z-Data-0.1.3.1, Z-Data-0.1.3.0,
Z-Data-0.1.2.0, Z-Data-0.1.1.0, Z-Data-0.1.0.0, Z-Data-2.0.0.0 (has the same
characteristics that caused the previous version to fail: excluded by
constraint '^>=1.3' from 'Z-IO')
[__2] rejecting: Z-Data-1.3.0.0 (conflict: base =>
ghc-prim==0.8.0/installed-0.8.0, Z-Data => ghc-prim>=0.5.3 && <0.8)
[__2] rejecting: Z-Data-0.8.7.0 (conflict: Z-IO => Z-Data^>=1.3)
[__2] skipping: Z-Data-0.8.6.0, Z-Data-0.8.5.0, Z-Data-0.8.4.0,
Z-Data-0.8.3.0, Z-Data-0.8.2.0, Z-Data-0.8.1.0, Z-Data-0.8.0.0, Z-Data-0.1.9.0
(has the same characteristics that caused the previous version to fail:
excluded by constraint '^>=1.3' from 'Z-IO')
[__2] fail (backjumping, conflict set: Z-Data, Z-IO, base)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: Z-IO, Z-Data, base