From http://mail.cs.uu.nl/pipermail/nix-dev/2009-June/002525.html:

For the record, swapon(1) erroneously refers to `/sbin/mkswap’, which it
tries to use when a swap partition contains stale swsuspend data:

swapon /dev/sda2
swapon: /dev/sda2: software suspend data detected. Reinitializing the swap.
execv: No such file or directory

I don’t have time to fix it right now, so I’d appreciate if someone did
it. :-)

Submitted on 30 June 2009 at 11:32