[BUGS] Hello I got this error when installing postgresql 9.4 on my antsledebian 8 LXC do you know a work around?

Setting up postgresql-9.4 (9.4.13-1.pgdg80+1) ...
Creating new PostgreSQL cluster 9.4/main ...
/usr/lib/postgresql/9.4/bin/initdb -D /var/lib/postgresql/9.4/main --auth-local peer --auth-host md5
WARNING:  01000: could not determine encoding for locale "en_US.utf8": codeset is "ANSI_X3.4-1968"
DETAIL:  Please report this to <pgsql-bugs@postgresql.org>.
LOCATION:  pg_get_encoding_from_locale, chklocale.c:389
The files belonging to this database system will be owned by user "postgres".
This user must also own the server process.

The database cluster will be initialized with locale "en_US.utf8".
could not determine encoding for locale "en_US.utf8": codeset is "ANSI_X3.4-1968"
initdb: could not find suitable encoding for locale "en_US.utf8"
Rerun initdb with the -E option.
Try "initdb --help" for more information.
Error: initdb failed
Error: could not create default cluster. Please create it manually with

  pg_createcluster 9.4 main --start

or a similar command (see 'man pg_createcluster').
update-alternatives: using /usr/share/postgresql/9.4/man/man1/postmaster.1.gz to provide /usr/share/man/man1/postmaster.1.gz (postmaster.1.gz) in auto mode
Setting up postgresql-contrib-9.4 (9.4.13-1.pgdg80+1) ...
root@antlet17:~# pg_createcluster 9.4 main --start
Creating new PostgreSQL cluster 9.4/main ...
/usr/lib/postgresql/9.4/bin/initdb -D /var/lib/postgresql/9.4/main --auth-local peer --auth-host md5
WARNING:  01000: could not determine encoding for locale "en_US.utf8": codeset is "ANSI_X3.4-1968"
DETAIL:  Please report this to <pgsql-bugs@postgresql.org>.
LOCATION:  pg_get_encoding_from_locale, chklocale.c:389
The files belonging to this database system will be owned by user "postgres".
This user must also own the server process.

The database cluster will be initialized with locale "en_US.utf8".
could not determine encoding for locale "en_US.utf8": codeset is "ANSI_X3.4-1968"
initdb: could not find suitable encoding for locale "en_US.utf8"
Rerun initdb with the -E option.
Try "initdb --help" for more information.
Error: initdb failed