Hi, I have a Haskell project where a number of executables are produced from mostly the same modules. I'm using a Makefile to enable parallel builds. I received advice[1] that ghc -M is broken, but that there is parallel ghc --make in HEAD. As far as I can tell, ghc --make does not allow building several binaries in one run, so I think it may not still be a full replacement for Makefiles. However I have a question about ghc --make that is also relevant without parallel ghc --make: If I have two main modules, prog1.hs and prog2.hs, which have mutual dependencies (for example, both import A from A.hs), is it safe to run "ghc --make prog1" in parallel with "ghc --make prog2"? IOW, is there some kind of locking to prevent both from building module A at the same time and interfering with each other? Is there a good way (either in current releases or HEAD) to build multiple binaries partially from the same sources in parallel? Sami [1] http://stackoverflow.com/questions/20938894/generating-correct-link-dependen...