port install to alternate jail path

[iLLfated]

Greetings,

  Lo all i've been trying to use: 

make install --prefix="/my/path" 

to install a port to an alternate path. I also tried
export PREFIX="/my/path" and prefix=/my/path" one of
them seems to work for some packages but not all. I've
been trying to glean info from the port creation
documentation tho i'm having a hard time figuring it
out. I've been examining bsd.port.mk. My attempts seem
to work for smaller packages tho I tried it with perl5
for example and it doesn't seem to be honoring the new
path and/or is complaining about it already being
installed (which it is tho not in in the new path).
Anyone know how I can accomplish my task of installing
a port to an alternate (in this case /my/jail) path?
Is there documentation for this and if so which
section of the handbook or url on the freebsd site.
Any help would be greatly appreciated. 

              Steve (l8tr3000 at yahoo.com)

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