When booting the ISO, you can observe a message that systemd-gpt-auto-generator has failed:
systemd-gpt-auto-generator[197]: Reading EFI variable /sys/firmware/efi/efivars/LoaderDevicePartUUID-4a67b082-0a4c-41cf-b6c7-440b29bb8c4f.
systemd-gpt-auto-generator[197]: open("/sys/firmware/efi/efivars/LoaderDevicePartUUID-4a67b082-0a4c-41cf-b6c7-440b29bb8c4f") failed: No such file or directory
systemd-gpt-auto-generator[197]: EFI loader partition unknown, exiting.
systemd-gpt-auto-generator[197]: (The boot loader did not set EFI variable LoaderDevicePartUUID.)
systemd-gpt-auto-generator[197]: Failed to open device: No such device
Seeing as it started to appear relatively recently, it may be a systemd bug.
Since we do not want any GPT partition automounting in the live environment anyway, systemd-gpt-auto-generator can simply be disabled.
Fixes#164.
By default, syslinux interprets TFTP paths as relative to the location of the *.c32 modules, regardless whether a path starts with a slash. Without the `::` that I added to all of these paths, syslinux cannot find these files. It searches for them in /%INSTALL_DIR%/syslinux//%INSTALL_DIR%/boot/x86_64/vmlinuz-linux, etc.
