Build Failure on ports-10.6_x86_64: boost, materialx

[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/12788
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    materialx
Subport list:
	- materialx
Variants:     None
Revision:     0c2d310a4edd60c11dbd5baa6530af1ab6d2a890
Build time:   0:02:41
Author:       Jason Liu <jasonliu-- at users.noreply.github.com>

Log from failed builds:
	Building 'materialx' ... [ERROR] (failed to install dependency 'boost')
	> maintainers: michaelld at macports.org.

Broken ports:
	- boost
	- materialx

Responsible maintainers:
	- michaelld at macports.org

Links to individual build jobs:
- ports-10.6_x86_64-builder #41016
  https://build.macports.org/builders/ports-10.6_x86_64-builder/builds/41016

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