E: Package 'live-initramfs' has no installation candidate

["'2+" <electriclightheads@gmail.com>]

hi
my:

lb config --distribution sid --archive-areas "main contrib non-free"
--packages "vim-nox alsa-utils dvtm htop python python-pygame ghc
caca-utils ncftp mutt fetchmail procmail msmtp sfront csound
vorbis-tools sox mpg321 yatm xine-console ecasound live-build mplayer
rubberband-cli lame dwm xine-ui iceweasel chromium-browser uzbl
audacity jackd supercollider supercollider-vim ffmpeg"
lb build

results into

---  8<  ---

Reading package lists... Done
Building dependency tree... Done
Package live-initramfs is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'live-initramfs' has no installation candidate
P: Begin unmounting filesystems...

---  8<  ---

what am i doing wrong?
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