filename too long in /usr/ports ?

[Alexandre H]

A file is rejected by tar :

# cd /usr
# tar zcf ports.tar.gz ports/
tar: File name too long for ustar 
ports/sysutils/logstash/logstash/patches/patch-vendor_bundle_jruby_1_9_gems_logstash-core-1_5_3-java_lib_logstash_patches_stronger_openssl_defaults_rb