svoid packageProgram(S outJarName, S programID, O... _) {
  packageProgram(javaxArtifactsDir(assertNempty(outJarName)), programID, _);
}

svoid packageProgram(File outJar, S programID, O... _) {
  ProgramPackager p = new (outJar, programID);
  optPar Cl<S> excludeSnippets;
  if (excludeSnippets != null)
    p.excludeSnippets = asSet(excludeSnippets);
  p.go();
}