I done exactly as instructed in the readme:
(I even copy pasted commands)

Installation
============
Create a filename called "build_corporative_site.make" with the following contents:

; make file for corporative-site profile
core = 7.x
api = 2
projects[drupal][type] = core
projects[drupal][version] = "7.7"
; Patching core to enable localized (translated) popup calendars. See http://drupal.org/node/507502#comment-4534106
projects[drupal][patch][] = "http://drupal.org/files/issues/507502-33.patch"

; Profile.
projects[corporative_site][type] = "profile"
projects[corporative_site][download][type] = "git"
projects[corporative_site][download][module] = "corporative_site"
projects[corporative_site][download][branch] = "7.x-1.x"

Run the following drush command:

drush make build_corporative_site.make corporative_site

The above command will create a directory "corporative_site" with Drupal 7 and the Corporative Site installation profile.

The installation seem to go along fine.

But where is the corporative_site folder? Where is the installed site? I don't find it on my server.