findExecutable now makes exception for phantom

core/util/findExecutable.js

@@ -1,9 +1,17 @@
 var path = require('path');
 
 module.exports = function(module, bin) {
+
+  if (module === 'phantomjs-prebuilt') {
+    return require('phantomjs-prebuilt').path;
+  }
+
+  // get the absolute path for package.json of a node_module
   var packageJSON = require.resolve(path.join(module, 'package.json'));
 
+  // then get the executable name
   var relativeBinary = require(packageJSON).bin[bin];
 
+  // return a path to the executable inside the execuatable's package
   return path.join(packageJSON.replace('package.json', ''), relativeBinary);
 };