Hello,

 I attempted to make an iso of owncloud.  That did not work, here is the result:

root@tkldev products/owncloud# make
deck /turnkey/fab/bootstraps/jessie build/bootstrap
fab-apply-overlay /turnkey/fab/common/overlays/turnkey.d/apt build/bootstrap;
fab-chroot build/bootstrap --script /turnkey/fab/common/conf/turnkey.d/apt;
fab-chroot build/bootstrap "echo nameserver 8.8.8.8 > /etc/resolv.conf";
fab-chroot build/bootstrap "echo nameserver 8.8.4.4 >> /etc/resolv.conf";
touch build/stamps/bootstrap

..

Setting up owncloud-app-user-webdavauth (8.0.3-2) ...
Setting up owncloud-app-gallery (8.0.3-2) ...
Setting up owncloud-server (8.0.3-2) ...
Setting up owncloud-config-apache (8.0.3-2) ...
Enabling conf owncloud.
To activate the new configuration, you need to run:
  service apache2 reload
[FAIL] Reloading web server: apache2 failed!
[warn] Apache2 is not running ... (warning).
apache2_invoke: Enable module rewrite
[....] Restarting web server: apache2AH00557: apache2: apr_sockaddr_info_get() failed for tkldev
AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1. Set the 'ServerName' directive globally to suppress this message
. ok 
apache2_invoke owncloud: already enabled
[ ok ] Reloading web server: apache2.
Setting up owncloud (8.0.3-2) ...
Processing triggers for libc-bin (2.19-18) ...
Processing triggers for libapache2-mod-php5 (5.6.7+dfsg-1) ...
+ TEMPLATE=/var/www/owncloud/core/templates/layout.guest.php
+ sed -i 's|<footer>.*|<footer><p class='\''info'\'' style='\''width: auto \!important;'\''><a href='\''http://www.turnkeylinux.org/owncloud'\''>ownCloud Appliance</a> \&ndash; Powered by <a href='\''http://www.turnkeylinux.org'\''>TurnKey Linux</a></p></footer>|' /var/www/owncloud/core/templates/layout.guest.php
+ XCACHEINI=/etc/php5/conf.d/20-xcache.ini
+ sed -i 's|xcache.admin.enable_auth.*|xcache.admin.enable_auth = Off|' /etc/php5/conf.d/20-xcache.ini
sed: can't read /etc/php5/conf.d/20-xcache.ini: No such file or directory
/usr/share/fab/product.mk:476: recipe for target 'build/stamps/root.patched' failed
make: *** [build/stamps/root.patched] Error 2

I use apt-file to find the package a file belongs to.
in wheezy php5-xcache provides /usr/share/doc/php5-xcache/examples/xcache.ini
in jessie php5-xcache is not available.

also in jessie I could not find xcache.ini provided by any package.

so i'd guess that php5-xcache needs to be replaced or eliminated as a required deb.