Full output:

a@desk:~/U/PSL/TP/guake
(master *=)(jc) $ ./scripts/bootstrap-dev-debian.sh
Install packages needed for execution
[sudo] password for a:
Reading package lists... Done
Building dependency tree
Reading state information... Done
gir1.2-notify-0.7 is already the newest version (0.7.9-1ubuntu2).
gir1.2-wnck-3.0 is already the newest version (3.36.0-1).
libutempter0 is already the newest version (1.1.6-4).
python3 is already the newest version (3.8.2-0ubuntu2).
python3-cairo is already the newest version (1.16.2-2ubuntu2).
python3-dbus is already the newest version (1.2.16-1build1).
python3-gi is already the newest version (3.36.0-1).
python3-pbr is already the newest version (5.4.5-0ubuntu1).
gir1.2-keybinder-3.0 is already the newest version (0.3.2-1ubuntu1).
libkeybinder-3.0-0 is already the newest version (0.3.2-1ubuntu1).
gir1.2-vte-2.91 is already the newest version (0.60.3-0ubuntu1~20.04).
libgirepository1.0-dev is already the newest version (1.64.1-1~ubuntu20.04.1).
python3-pip is already the newest version (20.0.2-5ubuntu1.6).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Install packages needed for making guake
Reading package lists... Done
Building dependency tree       
Reading state information... Done
gettext is already the newest version (0.19.8.1-10build1).
gsettings-desktop-schemas is already the newest version (3.36.0-1ubuntu1).
make is already the newest version (4.2.1-1.2).
pandoc is already the newest version (2.5-3build2).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Install needed development packages
Reading package lists... Done
Building dependency tree       
Reading state information... Done
aspell-fr is already the newest version (0.50-3-8).
colortest is already the newest version (20110624-7).
glade is already the newest version (3.22.2-1).
gnome-tweak-tool is already the newest version (3.34.0-2ubuntu1).
poedit is already the newest version (2.3-1build3).
dconf-editor is already the newest version (3.36.7-0ubuntu1).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
a@desk:~/U/PSL/TP/guake
(master *=)(jc) $ pip install PyGObject
Requirement already satisfied: PyGObject in /usr/lib/python3/dist-packages (3.36.0)
Requirement already satisfied: pycairo>=1.11.1 in /usr/lib/python3/dist-packages (from PyGObject) (1.16.2)
a@desk:~/U/PSL/TP/guake
(master *=)(jc) $