Build Failure on ports-10.11_x86_64

[buildbot at macports.org]

Status:       Failure
Build slave:  ports-10.11_x86_64
Full logs:    https://build.macports.org/builders/ports-10.11_x86_64-watcher/builds/15155
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    digital_rf
Subport list:
	- digital_rf
Variants:     None
Revision:     8565a67ff91d38adeefbb5dc4040a1ae7f51a8a2
Build time:   0:25:37
Author:       John Swoboda <swoboj at mit.edu>

Log from failed builds:

Links to individual build jobs:
- ports-10.11_x86_64-builder #56157
  https://build.macports.org/builders/ports-10.11_x86_64-builder/builds/56157

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