The "unset MODULE_DIR" trick was enough to get Linux 3.x kernels compiling, but it was definitely the Wrong Thing
We NEED MODULE_DIR set so that depmod can store the right dependencies during the build. The REAL problem with the
3.x kernels was two-fold: Our module-init-tools was so old that the kernel build needed to introduce a hack when
calling depmod (involving creating a symlink prepending 99.98 to the version number), and the depmod wrapper was
moved out of the Makefile into scripts/depmod.sh, so our substituteInPlace to get rid of '-b $(INSTALL_MOD_PATH)' in
the Makefile was a noop and INSTALL_MOD_PATH was still being passed to depmod. This is now fixed and modprobe can
successfully find dependencies using the modules.dep created during install
svn path=/nixpkgs/trunk/; revision=29559
I wanted to wait for kernel.org to get back up, but there doesn't seem to be any information about when that will be. If you don't trust that this is Torvalds' github, see https://lkml.org/lkml/2011/9/4/92 for how to verify
svn path=/nixpkgs/trunk/; revision=29198
