From ArchWiki

Zero Install is a method of running software as a normal user without installing it on your system. Documentation on how to install ZeroInstall is avalable at http://zero-install.sourceforge.net/install.html The instructions there work perfectly with a few exceptions.

Before install, you must use pacman to install gpg.

$ su
# pacman -S gnupg

When installing Zero Install, use these commands instead of the ones at the official site. (The official ones will fail, due to a lack of /etc/init.d

$ ./configure --with-userzeroinst --with-initdir/etc/rc.d
$ make
$ su -c 'make install'

When running Zero Install for the first time, make sure to use

$ su -c '/etc/rc.d/0install start'

instead of

$ su -c '/etc/init.d/0install start'

WikiMigration--dlanor 14:26, 23 Jul 2005 (EDT)