lib/rubygems-requirements-system/platform/ubuntu.rb in rubygems-requirements-system-0.0.2 vs lib/rubygems-requirements-system/platform/ubuntu.rb in rubygems-requirements-system-0.0.3

@@ -37,20 +37,20 @@
         platform == "ubuntu" || super
       end
 
       private
       def prepare_command_lines(package)
-        if package.start_with?("ppa:")
+        if package.is_a?(String) and package.start_with?("ppa:")
           [
             ["apt-get", "update"],
             install_command_line("software-properties-common"),
           ]
         else
           super
         end
       end
 
-      def install_command_line(package)
+      def install_command_line_package(package)
         if package.start_with?("ppa:")
           [
             "add-apt-repository",
             "-y",
             package,