for ((i=${#source[@]}; i>0; i--)); do
  if [ "${source[${i}]}" = "http://www.bay12games.com/dwarves/df_${_pkgver}_linux.tar.bz2" ]; then
    break;
  fi
done
source[${i}]="http://www.bay12games.com/dwarves/df_${_pkgver}_linux32.tar.bz2"
sha256sums[${i}]='d6e411607f211898db23528da3c129382bb38a430af2ae63e3b68883b036ab3d'