+
+ s apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3B4FE6ACC0B21F32
+ s dd of=/etc/apt/preferences.d/flidas-bionic <<EOF
+Package: *
+Pin: release a=bionic
+Pin-Priority: -100
+
+Package: *
+Pin: release a=bionic-updates
+Pin-Priority: -100
+
+Package: *
+Pin: release a=bionic-security
+Pin-Priority: -100
+EOF
+
+ # better to run btrfs-progs which matches our kernel version
+ # (note, renamed from btrfs-tools)
+ s dd of=/etc/apt/preferences.d/btrfs-progs <<EOF
+Package: btrfs-progs libzstd1
+Pin: release a=bionic
+Pin-Priority: 1005
+
+Package: btrfs-progs libzstd1
+Pin: release a=bionic-updates
+Pin-Priority: 1005
+
+Package: btrfs-progs libzstd1
+Pin: release a=bionic-security
+Pin-Priority: 1005
+EOF
+
+
+ t=$(mktemp)
+ cat >$t <<EOF
+deb http://us.archive.ubuntu.com/ubuntu/ bionic main
+deb http://us.archive.ubuntu.com/ubuntu/ bionic-updates main
+deb http://us.archive.ubuntu.com/ubuntu/ bionic-security main
+EOF
+ f=/etc/apt/sources.list.d/bionic.list
+ if ! diff -q $t $f; then
+ s cp $t $f
+ s chmod 644 $f
+ p update
+ fi
+
+ # no special reason, but its better for btrfs-progs to
+ # be closer to our kernel version
+ pi btrfs-progs