Ubuntu: postgresql-8.1-plr for Feisty missing plr.so and plr.sql

I am trying to get plr installed. However after running apt-get install postgresql-8.1-plr I get the dreaded:
ERROR: could not access file "$libdir/plr": No such file or directory
I double check the package list for plr
$ dpkg-query --listfiles postgresql-8.1-plr
/.
/usr
/usr/share
/usr/share/doc
/usr/share/doc/postgresql-8.1-plr
/usr/share/doc/postgresql-8.1-plr/index.html
/usr/share/doc/postgresql-8.1-plr/plr-aggregate-funcs.html
/usr/share/doc/postgresql-8.1-plr/plr-data.html
/usr/share/doc/postgresql-8.1-plr/plr-func-naming.html
/usr/share/doc/postgresql-8.1-plr/plr-funcs.html
/usr/share/doc/postgresql-8.1-plr/plr-global-data.html
/usr/share/doc/postgresql-8.1-plr/plr-install.html
/usr/share/doc/postgresql-8.1-plr/plr-license.html
/usr/share/doc/postgresql-8.1-plr/plr-module-funcs.html
/usr/share/doc/postgresql-8.1-plr/plr-overview.html
/usr/share/doc/postgresql-8.1-plr/plr-pgsql-support-funcs.html
/usr/share/doc/postgresql-8.1-plr/plr-spi-rsupport-funcs.html
/usr/share/doc/postgresql-8.1-plr/plr-trigger-func.html
/usr/share/doc/postgresql-8.1-plr/stylesheet.css
/usr/share/doc/postgresql-8.1-plr/copyright
/usr/share/doc/postgresql-8.1-plr/changelog.Debian.gzHmm.. where's the .so???

I check around on the ubuntu packages and confirm that other releases have the the .so file:
http://packages.ubuntu.com/dapper/libs/postgresql-8.1-plr
http://packages.ubuntu.com/edgy/libs/postgresql-8.1-plr

So I file a bug and start looking into a way to fix it.

I search for how to build a package: and come up the official guide.
$ mkdir -p ~src/plr/feisty
$ cd ~src/plr/feisty
$ apt-get source postgresql-8.1-plr
$ sudo apt-get build-dep postgresql-8.1-plr
$ cd plr-0.6.2
$ dpkg-buildpackage -rfakeroot -uc -b
$ cd ..

The resulting postgresql-8.1-plr_0.6.2-4ubuntu1_amd64.deb still is missing the files. $ dpkg --contents postgresql-8.1-plr_0.6.2-4ubuntu1_amd64.deb

After a lot of poking at the problem I notice that the binary files are created in a directory called install-8.1. However in that dir, are directories for 8.2.

After tracking the problem down, I created a diff file:
diff -u debian/rules /home/lance/rules.patched > /home/lance/rules.patch
And then I uploaded to launchpad.

--- debian/rules 2007-06-25 15:37:43.000000000 -0700
+++ /home/lance/rules.patched 2007-06-25 15:37:23.707021486 -0700
@@ -47,7 +47,7 @@
dh_testroot

# 8.1
- $(MAKE) -C build-8.1/plr -f Makefile.pgxs R_HOME=/usr/lib/R install DESTDIR=$(HERE)/install-8.1 PGXS=/usr/lib/postgresql/8.1/lib/pgxs/src/makefiles/pgxs.mk
+ $(MAKE) -C build-8.1/plr -f Makefile.pgxs R_HOME=/usr/lib/R install DESTDIR=$(HERE)/install-8.1 PGXS=/usr/lib/postgresql/8.1/lib/pgxs/src/makefiles/pgxs.mk datadir=/usr/share/postgresql/8.1 docdir=/usr/share/doc/postgresql-doc-8.1 pkglibdir=/usr/lib/postgresql/8.1/lib

# install files
dh_installdocs -a


Download the patch file to your home directory as rules.patch, then do:

$ mkdir /tmp/plr
$ cd /tmp/plr
$ apt-get source postgresql-8.1-plr
$ sudo apt-get build-dep postgresql-8.1-plr
$ cd plr-0.6.2
$ patch -p0 -i ~/rules.patch
$ dpkg-buildpackage -rfakeroot -uc -b
$ cd ..
$ sudo dpkg --install postgresql-8.1-plr_0.6.2-4ubuntu1_amd64.deb