Fixtures still loaded in production.js

1. 'app/fixtures/fixtures.js': {           
               ignore: true
   },        
2. 'app/fixtures/customer.js': {
               ignore: true
3. },
4. ....

However, when I build the application in production, all these files still get loaded as seen from net console from Firebug. Why is this? In my main index.js file, I load these normally with steal:

1. steal(   
       ...
       'app/fixtures/fixtures.js',
       'app/fixtures/customer.js',
2.      ....