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nixpkgs/pkgs/build-support/kernel/modules-closure.nix
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Nix

# Given a kernel build (with modules in $kernel/lib/modules/VERSION),
# produce a module tree in $out/lib/modules/VERSION that contains only
# the modules identified by `rootModules', plus their dependencies.
# Also generate an appropriate modules.dep.
{
stdenvNoCC,
kernel,
firmware,
nukeReferences,
rootModules,
kmod,
allowMissing ? false,
extraFirmwarePaths ? [ ],
}:
stdenvNoCC.mkDerivation {
name = kernel.name + "-shrunk";
builder = ./modules-closure.sh;
nativeBuildInputs = [
nukeReferences
kmod
];
inherit
kernel
firmware
rootModules
allowMissing
extraFirmwarePaths
;
allowedReferences = [ "out" ];
}