Build Failure on ports-10.6_x86_64: alembic

[buildbot at macports.org]

Status:       Failure
Build slave:  ports-10.6_x86_64
Full logs:    https://build.macports.org/builders/ports-10.6_x86_64-watcher/builds/6950
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    alembic
Subport list:
	- alembic
Variants:     None
Revision:     cff0757fb9ba4f7bcd9eae44748083807759ac20
Build time:   0:08:11
Author:       Jason Liu <jasonliu-- at users.noreply.github.com>

Log from failed builds:
	Building 'alembic' ... [ERROR]
	> maintainers: .

Broken ports:
	- alembic

Links to individual build jobs:
- ports-10.6_x86_64-builder #27179
  https://build.macports.org/builders/ports-10.6_x86_64-builder/builds/27179

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MacPorts Buildbot
https://build.macports.org/