In order to allow php5.2 being used on lucid, I created a ppa (ppa:txwikinger/php5.2) and build several php5.2 packages there. In order to prefer those packages I have given instructions to pin them. However, the packages php5-mcrypt and php5-imap do not correctly load due to the dependency to phpapi, even phpapi is provided by i.e. php5-cgi, php5-cli which are available. What is the problem?
I found the problem. I made a mistake with the pinning conditions.
The version of the pinning did not match what could be found or was missing for the package depending on the virtual package.