source_i686=(
  $(
    printf '%s\n' "${source_x86_64[@]}" | \
      sed '
        s/_x86_64\.tgz$/_x86.tgz/
        t
        d
      '
  )
)
md5sums_i686=(
  '9a9fc5108154808f3b10eafa54df1c74'
)