nixpkgs/pkgs/development/libraries/protobuf/3.12.nix

{ callPackage, ... }:

callPackage ./generic-v3.nix {
  version = "3.12.0";
  sha256 = "0ac0v7mx2sf4hwf61074bgh2m1q0rs88c7gc6v910sd7cw7gql3a";
}