npm-container always set in ./packages, ignoring process.env.PACKAGE_DIRS
meteor-core uses this approach:
// User can provide additional package directories to search in
// PACKAGE_DIRS (colon-separated).
_.each(process.env.PACKAGE_DIRS.split(':'), function (p) {
searchDirs.push(files.pathResolve(p));
});
npm-container always set in ./packages, ignoring
process.env.PACKAGE_DIRS
meteor-core uses this approach: