I downloaded ChaiScript from git and compiled it locally, and when going to install it to a local home directory location, I noticed that it wasn't respecting my custom CMAKE_INSTALL_PREFIX I passed to CMake:

cmake .. -DCMAKE_INSTALL_PREFIX=~/apps/chaiscript

When running make install, it seems to use DESTDIR from the shell environment. However, that isn't the complete picture because the installed pkgconfig/chaiscript.pc has the prefix variable set to /usr/local (the default?).

I would love to see this fixed, and am willing to help if someone can give me some pointers on the existing codebase.