Fail to install gitlab-ce on Debian/jessie: Unable to locate package gitlab-ce

see below:

xxx@deb:~$ curl -sS https://packages.gitlab.com/install/repositories/gitlab/gitlab-ce/script.deb.sh | sudo bash
Detected operating system as debian/jessie.
Checking for curl...
Detected curl...
Running apt-get update... done.
Installing debian-archive-keyring which is needed for installing 
apt-transport-https on many Debian systems.
Installing apt-transport-https... done.
Installing /etc/apt/sources.list.d/gitlab_gitlab-ce.list...done.
Importing packagecloud gpg key... done.
Running apt-get update... done.

The repository is setup! You can now install packages.
xxx@deb:~$ sudo apt-get install gitlab-ce
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package gitlab-ce