Re-compilation of #Lazarus worked although the #sources of #fpc and Lazarus could not be found by the IDE. I got the „docked“ layout which I like more than the „classic“ one. The newly compiled version is installed in ~/.lazarus folder.
So, development with #Pascal/Lazarus seems to work.
Next step: get #Git to work and test one of my projects. Therefore, the #VirtualBox needs access to my privat network.
But, first I will upgrade to #FreeBSD #12.0 - state of the virtual machine is stored.