[freebsd] spamassasin

[DAM]

Добрый вечер,

Возник затык со spamassasin

Не проходит компиляция с обломом

Can't open Makefile: No such file or directory.
===>  Building for spamassassin-3.4.1_11
make[2]: cannot open Makefile.

make[2]: stopped in 
/usr/ports/mail/spamassassin/work/Mail-SpamAssassin-3.4.1
===> Compilation failed unexpectedly.
Try to set MAKE_JOBS_UNSAFE=yes and rebuild before reporting the failure to
the maintainer.
*** Error code 1

Stop.
make[1]: stopped in /usr/ports/mail/spamassassin
*** Error code 1

Stop.
make: stopped in /usr/ports/mail/spamassassin

===>>> make build failed for mail/spamassassin
===>>> Aborting update

===>>> Update for mail/spamassassin failed
===>>> Aborting update

Чем грозит установка предложенной переменной? Или надо копать в другом 
месте?