Control Files Missing from postgis2_92 Installation on CentOS 5 x86_64

Hello,

I'm trying to enable the postgis extension on an installation of postgis2_92 from pgdg-92-centos.repo, but it seems that postgis.control is missing:

[postgres(at)webapp01 ~]$ psql twist
psql (9.2.13)
Type "help" for help.

twist=# CREATE EXTENSION postgis;
ERROR: could not open extension control file "/usr/pgsql-9.2/share/extension/postgis.control": No such file or directory

Here's a listing of the extension directory:

[root(at)webapp01 ~]# ls -l /usr/pgsql-9.2/share/extension/
total 12
-rw-r--r-- 1 root root 332 Jun 11 09:13 plpgsql--1.0.sql
-rw-r--r-- 1 root root 179 Jun 11 09:13 plpgsql.control
-rw-r--r-- 1 root root 381 Jun 11 09:13 plpgsql--unpackaged--1.0.sql

Here are the packages I have installed:

[root(at)webapp01 ~]# yum list postg*
[...]
Installed Packages
postgis2_92.x86_64 2.0.6-2.rhel5 installed
postgis2_92-client.x86_64 2.0.6-2.rhel5 installed
postgis2_92-debuginfo.x86_64 2.0.6-2.rhel5 installed
postgis2_92-devel.x86_64 2.0.6-2.rhel5 installed
postgis2_92-docs.x86_64 2.0.6-2.rhel5 installed
postgis2_92-utils.x86_64 2.0.6-2.rhel5 installed
postgresql92.x86_64 9.2.13-1PGDG.rhel5 installed
postgresql92-devel.x86_64 9.2.13-1PGDG.rhel5 installed
postgresql92-libs.x86_64 9.2.13-1PGDG.rhel5 installed
postgresql92-server.x86_64 9.2.13-1PGDG.rhel5 installed
postgresqlclient81.x86_64 8.1.17-1.el5.centos installed

I have postgresqlclient81.x86_64 installed to support some existing applications. Could that be causing a problem? Any help you could provide would be much appreciated.

Thanks,
Jeff