perl-tk intermittently fails with error messages that suggest that it is related to the build being done in parallel. For examples, see:
http://hydra.gnu.org/build/58535/log/tail-reload http://hydra.gnu.org/build/82185/log/tail-reload I tried to add #:parallel-build #f to the arguments, but that flag seems to be unsupported in the perl-build-system, even though it is almost identical to the gnu-build-system. Mark
