You may find you need to use different build commands for different environments, in this case, you can usually use something similar to the following:

```
gulp build --%environment%
```

Which would result in `gulp build --production` or `gulp build --staging` etc. as necessary. You can set your environment on a [per server basis](https://www.deployhq.com/support/servers/advanced-server-configuration#environment).

However, if you need to be a bit more specific, or maybe have a more complex set of build commands per server, you could use a conditional build command as follows:

```
if [ "%environment%" == "production" ]; then
  // Production commands
else
  // Other commands
fi
```