I selected the "Install Ubuntu"
I selected Switzerland as the keyboard layout and Time Zone (as shown in your screenshots).
My customized Ubuntu installed without error into VirtualBox.
After installation, I checked and the packages from your install.sh script were indeed installed.
(However, the language was still set to English, even though the time zone and keyboard were Switzerland. I should have also selected German; I will do another test to with German language).
TESTING UPDATE
--------------
I finally did a test using your locale... /bugs.launchpad .net/cubic/ +bug/1840232/ comments/ 21)
(See previous test https:/
I selected the "Install Ubuntu"
I selected Switzerland as the keyboard layout and Time Zone (as shown in your screenshots).
My customized Ubuntu installed without error into VirtualBox.
After installation, I checked and the packages from your install.sh script were indeed installed.
(However, the language was still set to English, even though the time zone and keyboard were Switzerland. I should have also selected German; I will do another test to with German language).