Merge pull request #168 from Methy42/master

Create a new object as the env for the ping process, without overwrit…

lib/builder/linux.js

@@ -118,7 +118,7 @@ builder.getCommandArguments = function (target, config) {
 builder.getSpawnOptions = function () {
     return {
         shell: false,
-        env: Object.assign(process.env, {LANG: 'C'}),
+        env: Object.assign({}, process.env, { LANG: 'C' }),
     };
 };