Do not filter time and extensible-exception as core packages.
Do not filter time and extensible-exception as core packages.

Fuuzetsu/cabal2nix,jb55/cabal2nix,gridaphobe/cabal2nix,dmalikov/cabal2nix,bennofs/cabal2nix,spencerjanssen/cabal2nix,psibi/cabal2nix