{
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, flake-utils }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs { inherit system; };
      in {
        devShells.default = pkgs.mkShell {
          buildInputs = with pkgs; [
            (dnscontrol.overrideAttrs (oldAttrs: {
              version = "4.38.0";
              src = fetchFromGitHub {
                owner = "DNSControl";
                repo = "dnscontrol";
                rev = "v${oldAttrs.version}";
                sha256 = "sha256-lM+9xuNB88csciIC5eu2oRl0IBqZE7CCPCxf8BEZSz0=";
              };
              vendorHash = "sha256-pzdOW+L/w74ANaCKXWQviBMDlSTOfebAVE7Cdd+lZLo=";
            }))
            (git-crypt.overrideAttrs (oldAttrs: { src = fetchFromGitHub {
              owner = "narrowin";
              repo = "git-crypt";
              rev = "v0.8.0-narrowin";
              sha256 = "sha256-sVlX+T67Vbsfr/o7u1y+nI07iRcjHx5HmsBBEULwgTg=";
            };}))
          ];
        };
      }
    );
}