port files/patch-*: PREFIX or LOCALBASE

[Nuno Teixeira]

Hello,

I'm working in a port that have several files/patches like:

--- NsCDE/bin/nscde.orig        2021-05-02 07:33:53 UTC
+++ NsCDE/bin/nscde
@@ -42,16 +42,11 @@ fi
 # Set main NSCDE and FVWM variables. Most of the things later
 # depends on this core variables.
 export FVWM_USERDIR="${HOME}/.NsCDE"
-export NSCDE_ROOT=/opt/NsCDE
-export FVWM_DATADIR="${NSCDE_ROOT}/config"
+export NSCDE_ROOT=/usr/local
+export FVWM_DATADIR="/usr/local/etc/nscde"
(...)

What is more correct to substitute "/usr/local" as variable?
${PREFIX} or ${LOCALBASE}?

Thanks in advance,
eduardo