For me the issue with such things is not so much the hassle as much as it is long term stability of an environment that I come to depend on. If I can't reproduce it from archived sources then there is a good chance that at some point in the future my stuff will suddenly and in-explicably stop working after some minor system update.

And python has a huge problem with this anyway. (Or, to put it probably more accurately, I have a huge problem with python in this way, historically my python code has had a relatively short shelf life compared to my C code (or even my PHP code)).