In part to substitute issues with time with issues with checksums, I am writing a build tool for Inferno loosely inspired by djb's redo. I think it deals nicely with some of the problems of make/mk tools: it handles multiple outputs, treats shell variables as /env files for dependencies, and uses the Inferno shell calling small programs, instead of a domain-specific shell-like language in a build description file.
https://github.com/catenate/credo
