Unable to upgrade old cluster from 8.4 to 9.0

Hello,

I have Debian Linux (unstable) server, and I am trying to upgrade 8.4 version
database to 9.0, all developer packages for both versions were installed, as
well as client ( postgresql-server-dev-8.4
postgresql-client-8.4 postgresql-server-dev-9.0 postgresql-client-9.0).

Here is the command I use

/usr/lib/postgresql/9.0/bin/pg_upgrade -d -c /var/lib/postgresql/8.4/main/ -D
/var/lib/postgresql/9.0/main/ -b /usr/lib/postgresql/8.4/bin/ -B
/usr/lib/postgresql/9.0/bin/ --user=postgres

output is as follows:

Performing Consistency Checks
-----------------------------
Checking old data directory (-c)
check for base failed: No such file or directory

I stopped server as it was suggested in upgrade manual
(http://developer.postgresql.org/pgdocs/postgres/pgupgrade.html)
All data directories are exist:

$ ls -lha /var/lib/postgresql/8.4/main/
total 72K
drwx------ 11 postgres postgres 4.0K Sep 22 23:25 .
drwxr-xr-x 3 root root 4.0K Sep 22 23:03 ..
drwx------ 11 postgres postgres 4.0K Feb 13 2010 base
drwx------ 2 postgres postgres 4.0K Sep 21 15:41 global
drwx------ 2 postgres postgres 4.0K Mar 4 2010 pg_clog
drwx------ 4 postgres postgres 4.0K Dec 3 2009 pg_multixact
drwx------ 2 postgres postgres 4.0K Sep 21 15:41 pg_stat_tmp
drwx------ 2 postgres postgres 4.0K Sep 12 00:58 pg_subtrans
drwx------ 2 postgres postgres 4.0K Dec 3 2009 pg_tblspc
drwx------ 2 postgres postgres 4.0K Dec 3 2009 pg_twophase
-rw------- 1 postgres postgres 4 Dec 3 2009 PG_VERSION
drwx------ 3 postgres postgres 4.0K Sep 18 13:26 pg_xlog
-rw-r--r-- 1 postgres postgres 17K Sep 22 23:25 postgresql.conf
-rw------- 1 postgres postgres 133 Sep 15 21:01 postmaster.opts
lrwxrwxrwx 1 root root 36 Dec 3 2009 server.crt ->
/etc/ssl/certs/ssl-cert-snakeoil.pem
lrwxrwxrwx 1 root root 38 Dec 3 2009 server.key ->
/etc/ssl/private/ssl-cert-snakeoil.key

$ ls -lha /var/lib/postgresql/9.0/main/
total 76K
drwx------ 12 postgres postgres 4.0K Sep 23 13:34 .
drwxr-xr-x 3 postgres postgres 4.0K Sep 21 15:49 ..
drwx------ 6 postgres postgres 4.0K Sep 22 22:51 base
drwx------ 2 postgres postgres 4.0K Sep 23 13:34 global
drwx------ 2 postgres postgres 4.0K Sep 21 15:49 pg_clog
drwx------ 4 postgres postgres 4.0K Sep 21 15:49 pg_multixact
drwx------ 2 postgres postgres 4.0K Sep 23 11:52 pg_notify
drwx------ 2 postgres postgres 4.0K Sep 23 13:34 pg_stat_tmp
drwx------ 2 postgres postgres 4.0K Sep 21 15:49 pg_subtrans
drwx------ 2 postgres postgres 4.0K Sep 21 15:49 pg_tblspc
drwx------ 2 postgres postgres 4.0K Sep 21 15:49 pg_twophase
-rw------- 1 postgres postgres 4 Sep 21 15:49 PG_VERSION
drwx------ 3 postgres postgres 4.0K Sep 21 15:49 pg_xlog
-rw-r--r-- 1 postgres postgres 18K Sep 22 23:27 postgresql.conf
-rw------- 1 postgres postgres 133 Sep 23 11:52 postmaster.opts
lrwxrwxrwx 1 root root 36 Sep 22 23:00 server.crt ->
/etc/ssl/certs/ssl-cert-snakeoil.pem
lrwxrwxrwx 1 root root 38 Sep 22 23:00 server.key ->
/etc/ssl/private/ssl-cert-snakeoil.key

Can anyone please give some advice why pg_upgrade fails to uprage old cluster to
new one?