Bam is a fast and flexible build system. Bam uses Lua to describe the build process. It's takes its inspiration for the script files from scons. While scons focuses on being 100% correct when building, bam makes a few sacrifices to acquire fast full and incremental build times.
I have solved this issue. Moving it to the cache_save function is a bit too late because some scripts needs to put stuff into that directory during the run.
Fixes #38