rumpbake is now a non-generated script, i.e. the same script is usable for all platform/architecture target configurations. In other words, nothing in app-tools exhibits conflicting behavior under the same name. In practical terms, that means that you can now put multiple app-tools directories into your path (e.g. 32bit and 64bit) and expect things to work. Down the road, once the usual Makefile fixing is done, we will of course support installing various toolchains into a single directory.
Note: after you pull rumprun and do run build-rr, you need to re-ferment the applications for baking. (fully rebuilding them is easiest)
Note2: you still cannot run build-rr with different target parameters in the same repo clone ... oh no, more makefiles!