Unable to install software on Debian 6 64bit minimal, Depends. How to resolve dependencies?

Question

linux

root@ndsdmfwg:~# apt-get install php5-cli php5-fpm php5-mysql -f
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:
 php5-cli : Depends: libdb5.1 but it is not installable
            Depends: libssl1.0.0 (>= 1.0.0) but it is not installable
            Depends: libxml2 (>= 2.8.0) but 2.7.8.dfsg-2+squeeze8 is to be installed
            Depends: php5-common (= 5.4.29-1~dotdeb.1) but it is not going to be installed
            Depends: libedit2 (>= 2.11-20080614-4) but 2.11-20080614-2 is to be installed
 php5-fpm : Depends: libdb5.1 but it is not installable
            Depends: libssl1.0.0 (>= 1.0.0) but it is not installable
            Depends: libxml2 (>= 2.8.0) but 2.7.8.dfsg-2+squeeze8 is to be installed
            Depends: php5-common (= 5.4.29-1~dotdeb.1) but it is not going to be installed
 php5-mysql : Depends: libmysqlclient18 (>= 5.5.24+dfsg-1) but it is not going to be installed
              Depends: php5-common (= 5.4.29-1~dotdeb.1) but it is not going to be installed
E: Broken packages

Answer 1

What have you done with sources.list? For squeeze, regular php is 5.3.3.