non-parallel building of a specific port (or parts of it)

Hello,

trying to fix a serious problem when a port builds the DOCS drives me crazy. The documentation
is comprised of lots of .html and .xml stuff I won't digg deeper into. 
For debugging purposes I already disabled parallel builds in our test environment in make.conf
or the appropriate counterpart located in poudriere's LOCALBASE folder
(/usr/local/etc/poudriere.d/make.conf[.some_special_jail]), then building the port works
flawless. Enabling parallel builds the let approx 8 out of 10 buildruns fail.

I'd like do disable parallel builds preferrably only for the DOCS part, but it would also be
all right for the port itself (build time is bearable), but I won't disable parallel builds in
general, especially not for poudriere.

Thanks in advance,

Oliver 


-- 
O. Hartmann