Build Failure on ports-10.6_i386_legacy: OpenSceneGraph-devel, zstd

[buildbot at macports.org]

Status:       Failure
Build slave:  ports-10.6_i386_legacy
Full logs:    https://build.macports.org/builders/ports-10.6_i386_legacy-watcher/builds/17848
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    OpenSceneGraph-devel
Subport list:
	- OpenSceneGraph-devel
Variants:     None
Revision:     322df201ee5fb0bf4f7678c16f4b58edc8149bad
Build time:   0:06:40
Author:       David B. Evans <devans at macports.org>

Log from failed builds:
	Building 'OpenSceneGraph-devel' ... [ERROR] (failed to install dependency 'zstd')
	> maintainers: sean at macports.org.

Broken ports:
	- OpenSceneGraph-devel
	- zstd

Responsible maintainers:
	- sean at macports.org

Links to individual build jobs:
- ports-10.6_i386_legacy-builder #48641
  https://build.macports.org/builders/ports-10.6_i386_legacy-builder/builds/48641

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