Build Failure on ports-10.6_i386: alembic, boost, gcc8, opencv, usd

[buildbot at macports.org]

Status:       Failure
Build slave:  ports-10.6_i386
Full logs:    https://build.macports.org/builders/ports-10.6_i386-watcher/builds/12674
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    usd
Subport list:
	- usd
Variants:     None
Revision:     370dafef40932d2a53303c40d4c09ae3f6f28c8b
Build time:   0:03:52
Author:       Jason Liu <jasonliu-- at users.noreply.github.com>

Log from failed builds:
	Building 'usd' ... [ERROR] (failed to install dependency 'alembic')
	> maintainers: .
	Building 'usd' ... [ERROR] (failed to install dependency 'boost')
	> maintainers: michaelld at macports.org.
	Building 'usd' ... [ERROR] (failed to install dependency 'opencv')
	> maintainers: .
	Building 'usd' ... [ERROR] (failed to install dependency 'gcc8')
	> maintainers: .

Broken ports:
	- alembic
	- boost
	- gcc8
	- opencv
	- usd

Responsible maintainers:
	- michaelld at macports.org

Links to individual build jobs:
- ports-10.6_i386-builder #21397
  https://build.macports.org/builders/ports-10.6_i386-builder/builds/21397

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