Bug#889995: steam: Fails to install: depends on removed package libtxc-dxtn0:i386

[Joe Dight]

Package: steam
Version: 1.0.0.54-3
Severity: important

Dear Maintainer,

Steam fails to install, as follows:
The following packages have unmet dependencies:
  steam:i386 : Depends: libtxc-dxtn0:i386 but it is not installable
E: Unable to correct problems, you have held broken packages.

libtxc-dxtn0 appears to be obsolete (and is no longer in unstable), as 
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=888430

Thanks,
Joe



-- System Information:
Debian Release: buster/sid
   APT prefers unstable
   APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.14.0-3-amd64 (SMP w/12 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), 
LANGUAGE=en_GB:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages steam depends on:
ii  debconf [debconf-2.0]            1.5.65
ii  libc6                            2.26-6
ii  libgl1-mesa-dri                  17.3.3-1
ii  libgl1-mesa-glx                  17.3.3-1
ii  libgpg-error0                    1.27-6
ii  libstdc++6                       8-20180207-2
ii  libtxc-dxtn-s2tc [libtxc-dxtn0]  1.0+git20151227-2
ii  libudev1                         237-1
ii  libx11-6                         2:1.6.4-3
ii  libxinerama1                     2:1.1.3-1+b3
ii  xz-utils                         5.2.2-1.3

Versions of packages steam recommends:
ii  fonts-liberation               1:1.07.4-5
ii  konsole [x-terminal-emulator]  4:17.08.3-1
ii  libxss1                        1:1.2.2-1+b2
ii  xterm [x-terminal-emulator]    331-1
ii  zenity                         3.26.0-2

Versions of packages steam suggests:
pn  steam-devices  <none>

-- debconf information excluded
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