Hello KiBi, you were right, it was due to the missing apt-setup/use_mirror.
I think we can close this particular braindropping-bug. On 26-08-15 13:08, Cyril Brulebois wrote: > Hi, > > NeatNerdPrime <neatnerdpr...@neatnerds.be> (2015-08-26): >> Followup on this issue: >> >> The sources.list file in /target/etc/apt appear to be different when >> performing installation preseeded or manual. >> It appears that the sources.list file generated with the preseed method >> has forgotten to add the mirror settings and the updates section of apt. >> It is generated correctly in the manual case. > Great, this explains what's happening here. You explicitly disabled the > network mirror in your preseed file: apt-setup/use_mirror is set to > false. No surprise that jessie and jessie-updates entries pointing to > the network mirror are missing. ;) > > Mraw, > KiBi.