Yet another Heroku Buildpack for CMake, but this one downloads CMake from the official website, cmake.org.
Usage:
heroku buildpacks:set https://github.com/platform45/heroku-buildpack-cmake
# if you use multiple buildpacks
heroku buildpacks:add --index 2 https://github.com/platform45/heroku-buildpack-cmake
See the Heroku documentation for more information: