\set to create shortcut

Hi,
I want to persist a shortcut between session.

> postgres [157394]=# \set cs 'select current_schema';
> postgres [157394]=# :cs
> ┌────────────────┐
> │ current_schema │
> ├────────────────┤
> │ public │
> └────────────────┘
> (1 row)

I put it in .pgsql_profile but it does not work

any idea?