cabal2nix-1.20: dependencies

Dependencies for cabal2nix-1.20

cabal2nix	base (>=3 && <5) Cabal (>=1.8) directory filepath HTTP nixos-types (>=1.2) pretty process regex-posix
hackage4nix	base (>=3 && <5) Cabal (>=1.8) containers directory filepath hackage-db mtl nixos-types (>=1.2) pretty regex-posix