Cannot install adminpack

Version 1.8.0 RC1 (Oct 14 2007, rev: 6722:6725)
PgAdmin installed from source with ./configure, make, make
install
OS: Debian etch
WxWidgets ver:2.8 installed with aptitude
Pg ver 8.2.5 installed from source

Followed the directions to make and install, the when
running the script:

ERROR:  incompatible library
"/usr/local/pgsql/lib/admin81.so": missing magic block
HINT:  Extension libraries are required to use the
PG_MODULE_MAGIC macro.

********** Error **********

ERROR: incompatible library
"/usr/local/pgsql/lib/admin81.so": missing magic block
SQL state: XX000
Hint: Extension libraries are required to use the
PG_MODULE_MAGIC macro.