Is it possible to build and install Ctrlr (or CtrlrX) on Linux?

I am interested in exploring Ctrlr, either the main fork or the CtrlrX fork. I am using Ubuntu, and apparently, there is some kind of support for installing on Linux, but there are no clear instructions for doing so on either project’s site. For example, Roman Kubiak (the original author) writes:

A build.sh script is provided in Builds/Generated/Linux/Standalone, a symlink of that script is located in Builds/Generated/Linux/VST, and is used to create a precompiled header and then to trigger the build using make. You can do that manually [sic] if you like, just have a look at the script, it’s really simple.

However, not only is there no file named build.sh, there’s not even a Build/ directory (and no build.sh elsewhere in the project’s directory structure).

Is it possible to build and install Ctrlr (or CtrlrX) on Linux? If so, how?