I've built a bundle for Adobe AEM to compile SASS files on-the-fly, as part of the process I create a resource containing the sass gem using gems-in-a-jar approach which is then added to the bundle classpath. When a user requests a specific resource, the bundle creates an osgi scripting container and runs a small ruby script to generate the compiled css.

container = new OSGiScriptingContainer(...)
container.put("content", source);
container.runScriptlet(bundle, "scripts/compile.rb");

engine = Sass::Engine.new(content, {
    :style => :compressed,
    :cache => false,
    :syntax => :scss
})

result = engine.render()

When the compilation phase takes place, the compilation will fail when sass attempts to include the date/datetime library as the dynamic import attempts to bring in joda-time.

Do we really need the DynamicImport-Package in the MANIFEST.MF?