The "singular-release" package provides "/etc/apt/sources.list.d/Singular.list" whose
content is same as that of "/etc/apt/sources.list.d/singular.list" (copied from
config/archives/singular.list.chroot at the chroot stage).
This causes a warning "Duplicate sources.list entry" while trying "apt-get update"
on the live system.
The "singular-release" package provides "/etc/apt/sources.list.d/Singular.list" whose content is same as that of "/etc/apt/sources.list.d/singular.list" (copied from config/archives/singular.list.chroot at the chroot stage).
This causes a warning "Duplicate sources.list entry" while trying "apt-get update" on the live system.