~ ❯❯❯ rm -Rf .cabal
~ ❯❯❯ rm -Rf .ghc
~ ❯❯❯ cabal new-update                                                                                                                            ✘ 1
Downloading the latest package list from hackage.haskell.org
~ ❯❯❯ cabal v2-install hie-bios -w ghc-8.10.2 --dry
Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] trying: hie-bios-0.7.1 (user goal)
[__1] trying: ghc-8.10.1 (dependency of hie-bios)
[__2] next goal: base (dependency of hie-bios)
[__2] rejecting: base-4.14.1.0/installed-4.14.1.0 (conflict: ghc => base<0 &&
==4.14.*)
[__2] skipping: base-4.14.0.0, base-4.13.0.0, base-4.12.0.0, base-4.11.1.0,
base-4.11.0.0, base-4.10.1.0, base-4.10.0.0, base-4.9.1.0, base-4.9.0.0,
base-4.8.2.0, base-4.8.1.0, base-4.8.0.0, base-4.7.0.2, base-4.7.0.1,
base-4.7.0.0, base-4.6.0.1, base-4.6.0.0, base-4.5.1.0, base-4.5.0.0,
base-4.4.1.0, base-4.4.0.0, base-4.3.1.0, base-4.3.0.0, base-4.2.0.2,
base-4.2.0.1, base-4.2.0.0, base-4.1.0.0, base-4.0.0.0, base-3.0.3.2,
base-3.0.3.1 (has the same characteristics that caused the previous version to
fail: excluded by constraint '<0 && ==4.14.*' from 'ghc')
[__2] fail (backjumping, conflict set: base, ghc, hie-bios)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: base, ghc, hie-bios


~ ❯❯❯ cabal --version                                                                                                                             ✘ 1
cabal-install version 3.2.0.0
compiled using version 3.2.0.0 of the Cabal library
~ ❯❯❯ ghc --version
The Glorious Glasgow Haskell Compilation System, version 8.10.2