NixOS/nixpkgs — pull request #5466 by bjornfor (2014-12-25 10:37:40+00:00)
Title: nixos/sudo: preserve $MODULE_DIR

Without this, "sudo modprobe foo" will try to work with modules in
/lib/modules instead of /run/current-system/kernel-modules/lib/modules.

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I'd like to merge this into master and release-14.12. Any objections?