Now systemd will drop support for unmerged-usr setups, it seems we have to switch to a merged /usr as well. Also see the Case for the /usr Merge.

There are two orders in which we can do this:

1. Move first:
   1. Get all main package contents out of /bin, /sbin, /lib32 and /lib64. Provide compatibility symlinks where needed (eg: /bin/bash).
   2. Remove compatibility symlinks, and directly
   3. Symlink /{bin,sbin,lib32,lib64} to their /usr/ counterparts with a usysconf trigger. The trigger will be trivial as those directories should be empty.

2. Move later:
   1. Remove compatibility symlinks, and directly
   2. Symlink /{bin,sbin,lib32,lib64} to their /usr/ counterparts through a usysconf trigger. The trigger will be somewhat complicated as it would need to actually merge the directories.
   3. Get all main package contents out of /bin, /sbin, /lib32 and /lib64 (leisurely).

Packages with files in /{bin,sbin,lib,lib32,lib64} (where the file is not a symlink to /usr/):

• Programs (/bin and /sbin):
  • acl
  • apcupsd
  • attr
  • audit
  • bash
  • busybox
  • bzip2
  • cifs-utils
  • coreutils
  • cpio
  • davfs2
  • e2fsprogs
  • fuse2
  • iproute2
  • kmod
  • lvm2
  • mdadm
  • multipath-tools
  • nfs-utils
  • ntfs-3g
  • ocamlbuild
  • procps-ng (also see T9039)
  • shadow
  • systemd (note: broken symlink in /lib/udev/udevd)
  • tar
  • tcsh
  • tlp
  • util-linux
  • wpa_supplicant
  • xfsprogs
  • zsh
• Libraries:
  • musl
  • notmuch
• Firmware (/lib/firmware):
  • alsa-firmware
  • intel-microcode
  • linux-firmware
  • sof-firmware
  • wireless-regdb
• Kernel modules (/lib/modules):
  • bbswitch
  • broadcom-sta
  • linux-current
  • linux-lts
  • nvidia-470-glx-driver (also: /sbin/create-uvm-dev-node)
  • nvidia-beta-driver (also: /sbin/create-uvm-dev-node)
  • nvidia-developer-driver (also: /sbin/create-uvm-dev-node)
  • nvidia-glx-driver (also: /sbin/create-uvm-dev-node)
  • openrazer
  • v4l2loopback
  • vhba-module
  • virtualbox (also: /sbin/mount.vboxsf)
  • xone
• PAM (/lib*/security):
  • fprintd
  • gdm
  • gnome-keyring
  • kwallet-pam
  • libcap2
  • libpwquality
  • pam-krb5
  • pam-u2f
  • pam (also: /sbin)
  • samba
  • systemd
  • virtualbox
  • yubico-pam
• Other/mixed:
  • apparmor (waiting on pam)
  • glibc
  • iptables

Packages with symlinks to /usr in /{bin,sbin,lib,lib32,lib64} or vice versa:

• coreutils
• dash
• gcc (/lib/cpp -> /usr/bin/cpp)
• glibc
• grep
• sed
• systemd
• util-linux
• xfsdump

Third party packages with files in /{bin,sbin,lib,lib32,lib64}:

• google-earth (/lib/ld-lsb-x86-64.so.3)