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550 B

{ lib, stdenvNoCC, dtc, findutils }:
with lib; {
applyOverlays = (base: overlays: stdenvNoCC.mkDerivation {
name = "device-tree-overlays";
nativeBuildInputs = [ dtc findutils ];
buildCommand = let
quotedDtbos = concatMapStringsSep " " (o: "\"${toString o}\"") (toList overlays);
in ''
for dtb in $(find ${base} -name "*.dtb" ); do
outDtb=$out/$(realpath --relative-to "${base}" "$dtb")
mkdir -p "$(dirname "$outDtb")"
fdtoverlay -o "$outDtb" -i "$dtb" ${quotedDtbos};
done
'';
});
}