Alien::Prototype::Window automatically installs the Prototype Window Class Copyright (C) 2007, Graham TerMarsch. All rights reserved. This is free software; you can redistribute it and/or modify it under the same terms as Perl itself. Please note that the Prototype Window Class comes with its own license. To install: perl Build.PL ./Build ./Build test ./Build install If fetching the Prototype Window Class distribution fails, placing a manually downloaded copy of the archive inside the build directory will allow your build to proceed.