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/26667
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:     397d12dcd528be8d8bc13af3109e990b36c91f15
Build time:   0:35:55
Author:       Marius Schamschula <mps at macports.org>

Log from failed builds:

Links to individual build jobs:
- ports-10.6_x86_64_legacy-builder #108659
  https://build.macports.org/builders/ports-10.6_x86_64_legacy-builder/builds/108659
- ports-10.6_x86_64_legacy-builder #108660
  https://build.macports.org/builders/ports-10.6_x86_64_legacy-builder/builds/108660
- ports-10.6_x86_64_legacy-builder #108661
  https://build.macports.org/builders/ports-10.6_x86_64_legacy-builder/builds/108661
- ports-10.6_x86_64_legacy-builder #108662
  https://build.macports.org/builders/ports-10.6_x86_64_legacy-builder/builds/108662
- ports-10.6_x86_64_legacy-builder #108663
  https://build.macports.org/builders/ports-10.6_x86_64_legacy-builder/builds/108663
- ports-10.6_x86_64_legacy-builder #108664
  https://build.macports.org/builders/ports-10.6_x86_64_legacy-builder/builds/108664
- ports-10.6_x86_64_legacy-builder #108665
  https://build.macports.org/builders/ports-10.6_x86_64_legacy-builder/builds/108665

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