Comment 5 for bug 54809

So, everything knows how to the 'update-fonts-* --x11r7'. It is just that, because of the version number going down, a new enough version wasn't installed at the point being run:

  $ grep -m1 -- --x11r7-layout /var/lib/dpkg/info/*postinst | sed 's/ */\t/g;s/^/ /'
  /var/lib/dpkg/info/x11-common.postinst: _cmd_opts=--x11r7-layout
  /var/lib/dpkg/info/xfonts-100dpi.postinst: _cmd_opts=--x11r7-layout
  /var/lib/dpkg/info/xfonts-75dpi.postinst: _cmd_opts=--x11r7-layout
  /var/lib/dpkg/info/xfonts-base.postinst: _cmd_opts=--x11r7-layout
  /var/lib/dpkg/info/xfonts-scalable.postinst: _cmd_opts=--x11r7-layout
  /var/lib/dpkg/info/xfonts-utils.postinst: _cmd_opts=--x11r7-layout
  /var/lib/dpkg/info/xserver-xorg-core.postinst: _cmd_opts=--x11r7-layout
  /var/lib/dpkg/info/xserver-xorg.postinst: _cmd_opts=--x11r7-layout

Magical.