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with import <nix/config.nix>;
let
builder = builtins.toFile "nar.sh"
''
export PATH=${nixBinDir}:${coreutils}
echo "packing ‘$storePath’..."
mkdir $out
dst=$out/tmp.nar.bz2
set -o pipefail
nix-store --dump "$storePath" | ${bzip2} > $dst
nix-hash --flat --type $hashAlgo --base32 $dst > $out/narbz2-hash
mv $out/tmp.nar.bz2 $out/$(cat $out/narbz2-hash).nar.bz2
'';
in
{ system, storePath, hashAlgo }:
derivation {
name = "nar";
builder = shell;
args = [ "-e" builder ];
inherit system storePath hashAlgo;
}
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