Imagine situation when you install for example openssl package like this (manually):
wget http://openssl.org/source/openssl-1.0.1h.tar.gz tar -xvf openssl-1.0.1h.tar.gz cd openssl-1.0.1h ./config shared make depend make make test make install
Now you want to install another package from aptitude like this:
apt-get install ca-certificates
But it says it will install openssl (lower version but with aptitude) of the package you already manually installed, how can this be installed with using the package I already manually installed?
Please do not take care of why I need to use install manually this package and not using official one, just please help me answer the question, thank you. You can imagine any other package if this one is a problem for you.