old_contents: from django.conf.urls import url
  from manager import views
  
  urlpatterns = [
      url(r'^$', views.package_list, name='package_list'),
      url(r'^packages/(?P<package_name>[a-zA-Z0-9_+-]+)/$', views.package_detail, name='package_detail'),
      url(r'^packages/(?P<package_name>[a-zA-Z0-9_+-]+)/build/$', views.package_build, name='package_build'),
      url(r'^packages/(?P<package_name>[a-zA-Z0-9_+-]+)/(?P<build_number>\d+)/$', views.build_detail, name='build_detail')
  ]
  
new_contents: from django.conf.urls import url
  from manager import views
  
  urlpatterns = [
      url(r'^$', views.package_list, name='package_list'),
      url(r'^packages/$', views.package_list, name='package_list'),
      url(r'^packages/(?P<package_name>[a-zA-Z0-9_+-]+)/$', views.package_detail, name='package_detail'),
      url(r'^packages/(?P<package_name>[a-zA-Z0-9_+-]+)/build/$', views.package_build, name='package_build'),
      url(r'^packages/(?P<package_name>[a-zA-Z0-9_+-]+)/(?P<build_number>\d+)/$', views.build_detail, name='build_detail')
  ]
  
subject: Add alternative package list url