[j1elo]

Well, the first page touches briefly on this:

> You should at least install it locally. It's easy (1-2 lines in many cases), and you'll find that 5 minutes of work will save you hundreds of lines and hours of CMakeLists.txt writing

I agree that it's cumbersome wanting to use tools that are not readily available in most commonly used systems. On the other hand, wanting to keep support for old systems that you may only hypothetically want to use shouldn't be limiting your choice of tools (or better versions of a tool). Achieving an easy and straightforward means of installing should be a goal for the tool itself, as it is the case for latest versions of CMake (assuming that phrase about 1-2 lines is true).

I agree that 3 years, or even 5, is an acceptable amount of time to keep using the same version of a tool. I'm currently at CMake 3.5, the one that comes with Ubuntu 16.04