anchor.diff:        configuration.nix:
           nixpkgs.config.allowUnfree = true;
           nixpkgs.config.joypixels.acceptLicense = true;
  -      
  +
         config.nix:
           allowUnfree = true;
           joypixels.acceptLicense = true;
  
positive.code: 
    src = assert !acceptLicense -> throwLicense;
      with systemSpecific; fetchurl {
        inherit name;
        url = "https://cdn.joypixels.com/distributions/${systemTag}/font/${version}/${fontFile}";
        sha256 = {
          darwin = "043980g0dlp8vd4qkbx6298fwz8ns0iwbxm0f8czd9s7n2xm4npq";
        }.${kernel.name} or "1vxqsqs93g4jyp01r47lrpcm0fmib2n1vysx32ksmfxmprimb75s";
      };
  
    dontUnpack = true;
  
    installPhase = with systemSpecific; ''
      install -Dm644 $src $out/share/fonts/truetype/joypixels.${ext}
    '';
  
    meta = with stdenv.lib; {
  
negative.code:       darwin = rec {
          systemTag =  "nix-darwin";
          capitalized = systemTag;
          fontFile = "JoyPixels-SBIX.ttf";
        };
      }.${kernel.name} or rec {
          systemTag = "nixos";
          capitalized = "NixOS";
          fontFile = "joypixels-android.ttf";
        };
  
      joypixels-free-license = with systemSpecific; {
  