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; }