node-archiver: Archive multiple directories

Is it possible to archive multiple directories when you know their paths? Let's say: ['/dir1','dir2', .., 'dirX']. What I am doing now, is to copying directories in a single directory, let's say: /dirToZip and do the following:

var archive = archiver.create('zip', {});
archive.on('error', function(err){
    throw err;
});
archive.directory('/dirToZip','').finalize(); 

Is there an approach to append directories into the archive and not with a specific pattern that bulk requires? Thanks in advance!

To everyone with the same issue, what finally worked for me is: lets say you have the following structure:

/Users/x/Desktop/tmp

| __ dir1

| __ dir2

| __ dir3

var baseDir = '/Users/x/Desktop/tmp/';
var dirNames = ['dir1','dir2','dir3']; //directories to zip

var archive = archiver.create('zip', {});
archive.on('error', function(err){
    throw err;
});

var output = fs.createWriteStream('/testDir/myZip.zip'); //path to create .zip file
output.on('close', function() {
    console.log(archive.pointer() + ' total bytes');
    console.log('archiver has been finalized and the output file descriptor has closed.');
});
archive.pipe(output);

dirNames.forEach(function(dirName) {
    // 1st argument is the path to directory 
    // 2nd argument is how to be structured in the archive (thats what i was missing!)
    archive.directory(baseDir + dirName, dirName);
});
archive.finalize();