touch: /dev/.initramfs/lupin-waited-for-devs: No such file or directory
touch: /dev/.initramfs/lupin-waited-for-devs: No such file or directory
cp: can't stat '/custom-installation/initrd-override/*': No such file or directory
touch: /dev/.initramfs/lupin-waited-for-devs: No such file or directory
cp: can't stat '/custom-installation/iso-override/*': No such file or directory
Generating locales (this might take a while)...
Generation complete.
+ [ -f /custom-installation/hooks/post-installer.sh ]
+ mkdir -p /root/usr/lib/ubiquity/target-config
+ cp /custom-installation/hooks/post-installer.sh /root/usr/lib/ubiquity/target-config/10post-installer
+ chmod +x /root/usr/lib/ubiquity/target-config/10post-installer
+ [ -f /custom-installation/patch/autopartition-loop ]
+ cp /custom-installation/patch/autopartition-loop /root/bin/autopartition-loop
+ [ -f /custom-installation/patch/user-params ]
+ cp /custom-installation/patch/user-params /root/bin/user-params
+ mkdir -p /tmp/loopdummy
+ touch /tmp/loopdummy/loopdummy
+ modprobe loop
+ losetup -f
+ ln -s /dev/loop2 /dev/loopdummy
+ losetup /dev/loopdummy /tmp/loopdummy/loopdummy
dbus-daemon[2537]: [session uid=999 pid=2537] Activating service name='org.gtk.vfs.Daemon' requested by ':1.0' (uid=999 pid=2538 comm="" label="unconfined")
dbus-daemon[2537]: [session uid=999 pid=2537] Successfully activated service 'org.gtk.vfs.Daemon'
dbus-daemon[2537]: [session uid=999 pid=2537] Activating service name='org.gtk.vfs.Metadata' requested by ':1.0' (uid=999 pid=2538 comm="" label="unconfined")
fuse: device not found, try 'modprobe fuse' first
dbus-daemon[2537]: [session uid=999 pid=2537] Successfully activated service 'org.gtk.vfs.Metadata'

(gvfsd-metadata:2549): GUdev-CRITICAL **: 09:59:00.498: g_udev_device_has_property: assertion 'G_UDEV_IS_DEVICE (device)' failed

(gvfsd-metadata:2549): GUdev-CRITICAL **: 09:59:00.498: g_udev_device_has_property: assertion 'G_UDEV_IS_DEVICE (device)' failed
A connection to the bus can't be made
Using CD-ROM mount point /cdrom/
Identifying... [2aa509fbbe31560badc5540a089d2b85-2]
Scanning disc for index files...
Found 2 package indexes, 0 source indexes, 0 translation indexes and 1 signatures
Found label 'Ubuntu 18.04 LTS _Bionic Beaver_ - Release amd64 (20180426)'
This disc is called: 
'Ubuntu 18.04 LTS _Bionic Beaver_ - Release amd64 (20180426)'
Copying package lists...gpgv: Signature made Thu Apr 26 18:43:31 2018 UTC
gpgv:                using RSA key D94AA3F0EFE21092
gpgv: Good signature from "Ubuntu CD Image Automatic Signing Key (2012) <cdimage@ubuntu.com>"

Reading Package Indexes... 0%

Reading Package Indexes... Done
Writing new source list
Source list entries for this disc are:
deb cdrom:[Ubuntu 18.04 LTS _Bionic Beaver_ - Release amd64 (20180426)]/ bionic main restricted
Repeat this process for the rest of the CDs in your set.