depends=(
  $(
    printf '%s\n' "${depends[@]}" | \
      sed '
        /^gnupg$/s/$/='"$(
          curl 'https://packages.debian.org/sid/gnupg' 2> /dev/null | \
            sed -n '
              /Package:\sgnupg/{
                s/^.*(\([^-]\+\)-.*$/\1/
                p
              }
            '
        )/"
  )
)