How do I use "USES=shebangfix"

[Avery Rozar]

I'm trying to build port for snort-2.9.8.0 and have run into a snag. I get
this error during "make makeplist". How do I use "USES=shebangfix" to fix
this error? Do I put it in /etc/make.conf, the make file for snort?

====> Running Q/A tests (stage-qa)

Error: '/bin/bash' is an invalid shebang you need USES=shebangfix for
'bin/appid_detector_builder.sh'


Thank you,
Avery