Sassc is a command-line implementation in C, which should be easy to add to the build process. Based on the authors I'd say it should stay up to date with sass:
Sass was originally created by the co-creator of this library, Hampton Catlin (@hcatlin). The extension and continuing evolution of the language has all been the result of years of work by Nathan Weizenbaum (@nex3) and Chris Eppstein (@chriseppstein).
