Please change the contents of your file /etc/apt/apt.conf.d/80-btrfs-snapshot to
DPkg::Pre-Invoke {"if [ -x /usr/bin/apt-btrfs-snapshot ] && apt-btrfs-snapshot supported; then flock -w 90 -x /run/apt-btrfs-snapshot.lock apt-btrfs-snapshot snapshot; fi "; };
on a single line and see if that fixes the problem. Apparently, 1 sure way to trigger this is to use update-manager, I believe. You will need to have the util-linux package installed.
@Anybody who can reproduce this
Please change the contents of your file /etc/apt/ apt.conf. d/80-btrfs- snapshot to
DPkg::Pre-Invoke {"if [ -x /usr/bin/ apt-btrfs- snapshot ] && apt-btrfs-snapshot supported; then flock -w 90 -x /run/apt- btrfs-snapshot. lock apt-btrfs-snapshot snapshot; fi "; };
on a single line and see if that fixes the problem. Apparently, 1 sure way to trigger this is to use update-manager, I believe. You will need to have the util-linux package installed.