pkgs.writeClosure

The following is the current implementation of this function.

writeClosure =
    paths:
    runCommand "runtime-deps"
      {
        # Get the cleaner exportReferencesGraph interface
        __structuredAttrs = true;
        exportReferencesGraph.graph = paths;
        nativeBuildInputs = [ jq ];
      }
      ''
        jq -r ".graph | map(.path) | sort | .[]" "$NIX_ATTRS_JSON_FILE" > "$out"
      '';