How to correctly generate pkg-plist

[SpamMePlease PleasePlease]

Hi,

I am writing new port that compiles and installs huge number of Erlang
libraries. Everythig is working fine until there's a need of deinstallation
or to make package - the problem is that the user might have older Erlang
version (for example, coming from ports unpacked during installation from a
cd) and when compiled with such Erlang, everything will be working, except
for the fact that older Erland will compile different versions of
libraries, and therefore my 2000 lines long pkg-plist will no longer be
valid. I thought I can remedy that simply by not listing the lib names and
their dir paths to avoid such situation, but to use @unexec ${RM} -rf
lib/portname, but then there's a problem with make package, that is not
containing all required and compiled libs.

How to solve that situation?

Regards,
S.