Build Failure on ports-10.5_ppc_legacy: yarn

[buildbot at macports.org]

Status:       Failure
Build slave:  ports-10.5_ppc_legacy
Full logs:    https://build.macports.org/builders/ports-10.5_ppc_legacy-watcher/builds/12096
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    yarn
Subport list:
	- yarn
Variants:     None
Revision:     7ca7e98b062eb5699f9d9cc3de35aecf1e2e820b
Build time:   0:01:18
Author:       Blair Zajac <blair at orcaware.com>

Log from failed builds:
	Building 'yarn' ... [ERROR] (failed to calculate dependencies)
	> maintainers: code at andrewsforge.com,isomarcte at gmail.com.

Broken ports:
	- yarn

Responsible maintainers:
	- code at andrewsforge.com
	- isomarcte at gmail.com

Links to individual build jobs:
- ports-10.5_ppc_legacy-builder #55438
  https://build.macports.org/builders/ports-10.5_ppc_legacy-builder/builds/55438

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