Collecting certbot-dns-rfc2136==0.18.0
  1 location(s) to search for versions of certbot-dns-rfc2136:
  * https://pypi.python.org/simple/certbot-dns-rfc2136/
  Getting page https://pypi.python.org/simple/certbot-dns-rfc2136/
  Analyzing links from page https://pypi.python.org/simple/certbot-dns-rfc2136/
    Found link https://pypi.python.org/packages/0c/e3/95311d5dcec17f6fa4ca6dd4ceb3436e22975decb1f5fc1028bae713b3d5/certbot-dns-rfc2136-0.18.0.tar.gz#md5=45562bbd7f07416357702210f2c53324 (from https://pypi.python.org/simple/certbot-dns-rfc2136/), version: 0.18.0
    Found link https://pypi.python.org/packages/1c/ea/a0dfe5581641b25a91a772f46b46fbc561de6036e59dd5e507e9b6213f57/certbot-dns-rfc2136-0.16.0.dev0.tar.gz#md5=af4134f635a1a19880111c2cea885ee6 (from https://pypi.python.org/simple/certbot-dns-rfc2136/), version: 0.16.0.dev0
    Found link https://pypi.python.org/packages/80/f6/f88e2e2740b3438acc6e961bd4ab8c99c7aefc3d4980c763dd8658ac6bda/certbot-dns-rfc2136-0.16.0.tar.gz#md5=92d167937d7fca2ea1ba4aaeb1afc5f0 (from https://pypi.python.org/simple/certbot-dns-rfc2136/), version: 0.16.0
    Found link https://pypi.python.org/packages/9b/3a/1f5d4e51d40a27bb836733b84be5adb932f4e758d356c776a801d94de880/certbot_dns_rfc2136-0.16.0-py2.py3-none-any.whl#md5=c932074a7b74637704a5e19f6a0e9932 (from https://pypi.python.org/simple/certbot-dns-rfc2136/), version: 0.16.0
    Found link https://pypi.python.org/packages/9c/df/37e3e19f5da77e980a3a6c4b682194f08336d8003db581f4789d7b1ef9f3/certbot_dns_rfc2136-0.17.0-py2.py3-none-any.whl#md5=d0c7646528f3ffc9aff7ea0230d3aabf (from https://pypi.python.org/simple/certbot-dns-rfc2136/), version: 0.17.0
    Found link https://pypi.python.org/packages/a8/ef/9689b638b78c1c5c1654dea61ceaee65f2e964673da33c507c62dc63dbd9/certbot_dns_rfc2136-0.18.0-py2.py3-none-any.whl#md5=c16cf59f08fb8f61423d6efc067deaed (from https://pypi.python.org/simple/certbot-dns-rfc2136/), version: 0.18.0
    Found link https://pypi.python.org/packages/d0/3b/9171e1c6e194d0f5b0def7285783fb4a13a1b8309056c31929194429ea1d/certbot-dns-rfc2136-0.17.0.tar.gz#md5=eb367c992a1694a202b0f4e5e6171626 (from https://pypi.python.org/simple/certbot-dns-rfc2136/), version: 0.17.0
  Using version 0.18.0 (newest of versions: 0.18.0)
  Downloading certbot_dns_rfc2136-0.18.0-py2.py3-none-any.whl
  Downloading from URL https://pypi.python.org/packages/a8/ef/9689b638b78c1c5c1654dea61ceaee65f2e964673da33c507c62dc63dbd9/certbot_dns_rfc2136-0.18.0-py2.py3-none-any.whl#md5=c16cf59f08fb8f61423d6efc067deaed (from https://pypi.python.org/simple/certbot-dns-rfc2136/)
  Saved /tmp/tmpsq67ipoh/certbot_dns_rfc2136-0.18.0-py2.py3-none-any.whl
Skipping certbot-dns-rfc2136, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-build-lrkhrht8/certbot-dns-rfc2136