modules for the initial ramdisk if there were no additional kernel
module packages (such as the NVIDIA driver or AUFS), leading to a
kernel panic in the initrd. This was because in that case modprobe
would print paths referring to the kernel path rather than the
module aggregation path, and then `sed "s^$kernel^$out^"' would
silently fail. Fixed.
* Also, use depmod here rather than doing sed hackery on modules.dep.
* Also, `allowMissing' was broken (missing "$" before the variable
name).
svn path=/nixpkgs/trunk/; revision=15394
