Building the Linux kernel on a Mac inside Docker: Attempt #2

Todays failure is about xargs. For whatever reason inside a qemu-user-static environment inside docker it can no longer do its part to help build a kernel:

  CLEAN   arch/arm/boot
/usr/bin/xargs: rm: Argument list too long
Makefile:1502: recipe for target 'clean' failed
make[2]: *** [clean] Error 126
make[2]: Leaving directory '/src/debian/linux-source-4.7.0/usr/src/linux-source-4.7.0'
debian/ruleset/targets/ recipe for target 'debian/stamp/install/linux-source-4.7.0' failed
make[1]: *** [debian/stamp/install/linux-source-4.7.0] Error 2
make[1]: Leaving directory '/src'
debian/ruleset/ recipe for target 'kernel_source' failed

It looks like I need to patch the kernels Makefile to workaround some limit qemu is introducing.