We already had the meta viewport in our template since 67c1b4cd

But it requires ikiwiki >= 3.20150107

wiki/src/contribute/build.mdwn

@@ -265,7 +265,7 @@ The following Debian packages need to be installed:
   just like `live-build`
 * `eatmydata` 82 or newer, available in wheezy-backports.
 * `time` and `whois` (for `/usr/bin/mkpasswd`)
-* `ikiwiki` 3.20120725 or newer, available in wheezy-backports.
+* `ikiwiki` 3.20150107 or newer, available in stretch.
 * `apt-get install libyaml-perl libyaml-libyaml-perl po4a perlmagick
   libyaml-syck-perl` so that the wiki builds smoothly.
 * `dpkg-dev`

wiki/src/install/debian/usb.mdwn

@@ -5,7 +5,6 @@
 [[!meta stylesheet="inc/stylesheets/dave" rel="stylesheet" title=""]]
 [[!meta stylesheet="inc/stylesheets/steps" rel="stylesheet" title=""]]
 [[!meta stylesheet="inc/stylesheets/debian" rel="stylesheet" title=""]]
- <meta name="viewport" content="width=device-width, initial-scale=1">
 
 [[!meta script="install/inc/js/dave"]]