]> Hi, Thanks for the hint -- it was sufficient to get me on the right track. Note however that instead of using the "compile" tag, I had to use "ocamldep". Also, the creation of the single-purpose tag can be avoided by using "file:", as follows: | After_rules -> dep ["ocamldep"; "file:foobar.ml"] ["data.txt"] Best regards, Dario Teixeira