Kernel module aggregator: Use kmod instead of module-init-tools

pkgs/os-specific/linux/kmod/aggregator.nix

@@ -0,0 +1,27 @@
+{ stdenv, kmod, modules, buildEnv }:
+
+buildEnv {
+  name = "kernel-modules";
+
+  paths = modules;
+
+  postBuild =
+    ''
+      source ${stdenv}/setup
+
+      kernelVersion=$(cd $out/lib/modules && ls -d *)
+      if test "$(echo $kernelVersion | wc -w)" != 1; then
+         echo "inconsistent kernel versions: $kernelVersion"
+         exit 1
+      fi
+
+      echo "kernel version is $kernelVersion"
+
+      # Regenerate the depmod map files.  Be sure to pass an explicit
+      # kernel version number, otherwise depmod will use `uname -r'.
+      if test -w $out/lib/modules/$kernelVersion; then
+          rm -f $out/lib/modules/$kernelVersion/modules.*
+          ${kmod}/sbin/depmod -b $out -a $kernelVersion
+      fi
+    '';
+}