Build Failure on ports-10.6_x86_64: ghc, py37-packaging, stack, xorg-xcb-proto

[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/4853
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    ghc
Subport list:
	- ghc
Variants:     None
Revision:     16bf91aad3fb09da600736391ac522752ee4227a
Build time:   0:05:56
Author:       Steven Thomas Smith <s.t.smith at ieee.org>

Log from failed builds:
	Building 'ghc' ... [ERROR] (failed to install dependency 'stack')
	> maintainers: s.t.smith at ieee.org,s.t.smith at ieee.org.
	Building 'ghc' ... [ERROR] (failed to install dependency 'py37-packaging')
	> maintainers: s.t.smith at ieee.org.
	Building 'ghc' ... [ERROR] (failed to install dependency 'xorg-xcb-proto')
	> maintainers: s.t.smith at ieee.org,jeremyhu at macports.org.

Broken ports:
	- ghc
	- py37-packaging
	- stack
	- xorg-xcb-proto

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

Links to individual build jobs:
- ports-10.6_x86_64-builder #21713
  https://build.macports.org/builders/ports-10.6_x86_64-builder/builds/21713

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