Generated opam file is wrong when passing -f <path/to/my/config.ml>

[hannesm]

x-mirage-configure: ["sh" "-exc" "cd tutorial/hello/ && mirage configure -t hvt -f tutorial/hello/config.ml --context tutorial/hello/mirage/context --no-extra-repo"]

This includes both cd tutotial/hello and -f tutorial/hello/config.ml which won't work. It is not entirely clear to me how to figure out inside of mirage which working directory we've been called by -- or rephrased how -f is implemented (whether it changes the working directory).