# File lib/bundler/rubygems_integration.rb, line 67
    def sources=(val)
      # Gem.configuration creates a new Gem::ConfigFile, which by default will read ~/.gemrc
      # If that file exists, its settings (including sources) will overwrite the values we
      # are about to set here. In order to avoid that, we force memoizing the config file now.
      configuration

      Gem.sources = val
    end