### Is this a feature request or a bug? I guess this is feature request. ### What is the current behavior? We would like WebExtension authors to install [libdweb](http://github.com/mozilla/libdweb) via npm and then add entries to the manifest to include experimental APIs. Sadly it becomes impossible to use `web-ext build` to create an add-on such that it would include experimental APIs from libdweb. ### What is the expected or desired behavior? Following should include path negated in the ignored pattern. ``` web-ext build --ignore-files '!node_modules/libdweb/src/**' ``` ``` node --version && npm --version && web-ext --version v9.3.0 5.5.1 2.7.0 ````