Build Failure on ports-10.12_x86_64: py36-dns-lexicon, py37-dns-lexicon, py39-dns-lexicon

[buildbot at macports.org]

Status:       Failure
Build slave:  ports-10.12_x86_64
Full logs:    https://build.macports.org/builders/ports-10.12_x86_64-watcher/builds/39135
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    py-dns-lexicon
Subport list:
	- py36-dns-lexicon
	- py37-dns-lexicon
	- py39-dns-lexicon
Variants:     None
Revision:     24ebfce225d8cd5b0146c3fc182e9a84471f96bc
Build time:   0:12:31
Author:       Marius Schamschula <mps at macports.org>

Log from failed builds:
	Building 'py36-dns-lexicon' ... [ERROR] (failed to calculate dependencies)
	> maintainers: mps at macports.org.
	Building 'py37-dns-lexicon' ... [ERROR] (failed to calculate dependencies)
	> maintainers: mps at macports.org.
	Building 'py39-dns-lexicon' ... [ERROR] (failed to calculate dependencies)
	> maintainers: mps at macports.org.

Broken ports:
	- py36-dns-lexicon
	- py37-dns-lexicon
	- py39-dns-lexicon

Responsible maintainers:
	- mps at macports.org

Links to individual build jobs:
- ports-10.12_x86_64-builder #131994
  https://build.macports.org/builders/ports-10.12_x86_64-builder/builds/131994
- ports-10.12_x86_64-builder #131995
  https://build.macports.org/builders/ports-10.12_x86_64-builder/builds/131995
- ports-10.12_x86_64-builder #131996
  https://build.macports.org/builders/ports-10.12_x86_64-builder/builds/131996

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