anchor.diff:    dontInstall = true;
   
     inherit meta;
  -}
  +} // attrs')
  
positive.code: let
    requiredOctavePackages' = computeRequiredOctavePackages requiredOctavePackages;
  
  in stdenv.mkDerivation {
    packageName = "${fullLibName}";
    # The name of the octave package ends up being
    # "octave-version-package-version"
  
negative.code: 
    requiredOctavePackages = requiredOctavePackages';
  
    nativeBuildInputs = nativeBuildInputs';
  
    buildInputs = buildInputs ++ requiredOctavePackages';
  
  