still tweaking..

bin.js

@@ -14,10 +14,11 @@ var argv = require('yargs')
   .help('h')
   .argv;
 
-require('./lib/cli').run(argv, function (err) {
+require('./lib/cli').run(argv, function (err, res) {
   if (err) {
     console.error('symlink:', err.message);
     process.exit(1);
   }
+  //console.log(res)
   process.exit(0);
 });

lib/cli.js

@@ -4,23 +4,15 @@ var async = require('async');
 
 var dryRunHandler = function (cmds, done) {
   console.log(JSON.stringify(cmds, null, " "));
-  done();
+  done(null);
 };
 
 var executeHandler = function (cmds, done) {
-  // create one cp function cmd that execs and cbs to next in async series
-  var execs = cmds.map(function (cmd) {
-    return function (cb) {
-      console.log(cmd); // npm link xs && npm install ys && npm link
-      cp.exec(cmd, function (error, stdout) {
-        console.log(stdout);
-        cb(error);
-      });
-    };
-  });
-
-  // exec commands synchronously
-  async.series(execs, done);
+  var iterator = function (cmd, cb) {
+    console.log(cmd);
+    cp.exec(cmd, cb);
+  };
+  async.mapSeries(cmds, iterator, done);
 };
 
 exports.run = function (argv, done) {