Some relatively simply patches make autogen build with guile-3.0. Used by both Debian an openSUSE, so already has a bit of field testing. I'm not 100% sure that it wasn't just dumb luck, but it seemed like building autogen with guile-3.0 was more likely to build reproducibly. It did require adding automake and autoconf to inputs, seeming to detect that something changed since configure was generated. Not sure if that could be avoided by being cleverer, or if that is an acceptible change. live well, vagrant