Building ninja from the binaries ubuntu 18.04

Question

I am new to the process of building packages from their binaries, and I feel like I am missing something conceptually. I built ninja version 1.10.2 from the binaries using cmake and it seemed to work fine, but whenever I check ninja --version it returns the older version. What final step am I missing to ensure that its using the newly installed version? Here are the steps I have taken so far:

1. Downloaded the tar.gz from here https://github.com/ninja-build/ninja/releases

2. Extracted the files to a directory I made in my home called ninja

   tar xvzf ~/Downloads/"filename" -C ~/ninja

3. It extracted fine and now if I navigate to ~/ninja/ninja-1.10.2/ there is a READ.ME with the following instructions on building with cmake

   cmake -Bbuild-cmake -H.

   cmake --build-cmake

So I follow those directions while in ~/ninja/ninja-1.10.2/. I get no errors and now there is a build-cmake directory! What am i supposed to do next?

I am guessing I have the new version installed but I haven't pointed to it so ninja doesn't know where this new version is / needs to load it. How do I do that?