Various base directories/files have varying mtimes

Various base directories/files have varying mtimes (eg. /dev/pts, /etc)
Various base directories/files have varying mtimes (eg. /dev/pts, /etc) on feature/buster:

│ ├── unsquashfs -d '' -lls {}
│ │ @@ -176,24 +176,24 @@
[..]
│ │  crw-rw-rw- root/root             1,  9 2018-09-05 16:51 /dev/urandom
│ │  crw-rw-rw- root/root             1,  5 2018-09-05 16:51 /dev/zero
│ │ -drwxr-xr-x root/root              4825 2019-01-05 12:13 /etc
│ │ +drwxr-xr-x root/root              4825 2019-01-05 14:52 /etc
[..]
│ │ --rw-r--r-- root/root                 0 2019-01-05 12:13 /etc/hosts
│ │ +-rw-r--r-- root/root                 0 2019-01-05 14:52 /etc/hosts

Related issues

• Is duplicate of #16294 (closed)
• Blocks #16285 (closed)

Original created by @lamby on 16295 (Redmine)