~ sudo yaourt -S bespin-kdm-svn
==> WARNING: Building package as root is dangerous.
 Please run yaourt as a non-privileged user.

==> Downloading bespin-kdm-svn PKGBUILD from AUR...
x PKGBUILD
bespin-kdm-svn 1711-1  (Fri Sep  3 13:23:50 GMT 2010)
( Unsupported package: Potentially dangerous ! )
==> Edit PKGBUILD ? [Y/n] ("A" to abort)
==> ------------------------------------
==> y

Please add $EDITOR to your environment variables
for example:
export EDITOR="vim" (in ~/.bashrc)
(replace vim with your favorite editor)

==> Edit PKGBUILD with:  vim

makepkg: invalid option '--asroot'
Unable to read PKGBUILD