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root@owncloud:~# apt-get install php7.0-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 php7.0-dev : Depends: libpcre3-dev but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
root@owncloud:~# ppa-purge ppa:ondrej/php7.0
Updating packages lists
PPA to be removed: ondrej php7.0
Warning:  Could not find package list for PPA: ondrej php7.0
root@owncloud:~#