Build Failure on ports-10.6_x86_64_legacy

[buildbot at macports.org]

Status:       Failure
Build slave:  ports-10.6_x86_64_legacy
Full logs:    https://build.macports.org/builders/ports-10.6_x86_64_legacy-watcher/builds/25438
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    py-acme certbot certbot-apache certbot-nginx
Subport list:
	- py27-acme
	- certbot
	- certbot-apache
	- certbot-nginx
	- py-acme
	- py36-acme
	- py37-acme
Variants:     None
Revision:     6a4e58280d04e0c2c89e533330553bf5ff20f9a1
Build time:   0:35:06
Author:       Marius Schamschula <mps at macports.org>

Log from failed builds:

Links to individual build jobs:
- ports-10.6_x86_64_legacy-builder #105129
  https://build.macports.org/builders/ports-10.6_x86_64_legacy-builder/builds/105129
- ports-10.6_x86_64_legacy-builder #105130
  https://build.macports.org/builders/ports-10.6_x86_64_legacy-builder/builds/105130
- ports-10.6_x86_64_legacy-builder #105131
  https://build.macports.org/builders/ports-10.6_x86_64_legacy-builder/builds/105131
- ports-10.6_x86_64_legacy-builder #105132
  https://build.macports.org/builders/ports-10.6_x86_64_legacy-builder/builds/105132
- ports-10.6_x86_64_legacy-builder #105133
  https://build.macports.org/builders/ports-10.6_x86_64_legacy-builder/builds/105133
- ports-10.6_x86_64_legacy-builder #105134
  https://build.macports.org/builders/ports-10.6_x86_64_legacy-builder/builds/105134
- ports-10.6_x86_64_legacy-builder #105135
  https://build.macports.org/builders/ports-10.6_x86_64_legacy-builder/builds/105135

-- 
Best regards,
MacPorts Buildbot
https://build.macports.org/