GPL and other licences

[Fung]

Dear folks,

I am currently doing some research on open source licences and while
reading the GPL licence the following question arose: Distributing a
derivative work combined from software licensed under the Apache
Software Licence 2.0 and software licensed under the GNU GPL 2.0 is not
possible, due to the patent terminating clause in the Apache Software
Licence. But is it forbidden to create a derivative work from software
licensed under those two licences, without distributing? So only using
it for personal/internal use.

In the GPL licence I can only find provisions on distribution of the
original form or modified/covered form. Or is this restricted by
copryright law?

Yours,


Fung