Build Failure on ports-10.7_x86_64_legacy: cabal, ghc

[buildbot at macports.org]

Status:       Failure
Build slave:  ports-10.7_x86_64_legacy
Full logs:    https://build.macports.org/builders/ports-10.7_x86_64_legacy-watcher/builds/27730
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    cabal
Subport list:
	- cabal
Variants:     None
Revision:     51c700870f0490118e5a4261d6d65bcbef9f807a
Build time:   0:02:49
Author:       Steven Thomas Smith <s.t.smith at ieee.org>

Log from failed builds:
	Building 'cabal' ... [ERROR] (failed to install dependency 'ghc')
	> maintainers: s.t.smith at ieee.org.

Broken ports:
	- cabal
	- ghc

Responsible maintainers:
	- s.t.smith at ieee.org

Links to individual build jobs:
- ports-10.7_x86_64_legacy-builder #111756
  https://build.macports.org/builders/ports-10.7_x86_64_legacy-builder/builds/111756

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