The streamLayeredImage wrapper invokes the image streamer at build time on
the build platform. It was built with makeWrapper, which bakes
targetPackages.runtimeShell into the shebang. Under cross compilation that
is the host shell, so the wrapper is not executable on the builder and
crashes (e.g. a Linux image built on a Darwin builder segfaults the
streamer).
This was fixed by switching to pkgsBuildBuild.makeWrapper (build == host == target)
so the shebang points at the build-platform shell.
Jörg Thalheim
5dd3a57308