archiso # the official package does not build an iso on i686
cuda # cuda 9.0 is 64-bit only
dmd # fails to build, <a href="https://issues.dlang.org/show_bug.cgi?id=17833">upstream</a> is unresponsive, see <a href="https://bbs.archlinux32.org/viewtopic.php?pid=492#p492">forum</a>
linux-hardened # not <a href="https://mirror.archlinux32.org/irc-logs/%23archlinux-ports/2017-06-28.html#04:04:01">really useful</a> on i686 + hard to maintain
luxrays # does not compile on i686 - see FS#54960
python-pytorch # Gloo can only be built on 64-bit systems
rubinius # Support for non-64bit platforms was deprecated 1 Jun 2016 and has now been removed. If non-64bit support is a critical feature for your application, please email contact@rubinius.com
wiredtiger # WiredTiger requires a 64-bit build
zcash # <a href="https://github.com/zcash/zcash/issues/914">We don't yet support 32bit systems (and we won't by launch) but we can look into this after launch.</a>