diff --git a/flake.nix b/flake.nix
index a247f10..bd594bd 100644
--- a/flake.nix
+++ b/flake.nix
@@ -86,7 +86,7 @@
                 pkgs.writeShellScriptBin "package-sword" ''
                   out=$(pwd)
                   pushd ${svnSword}
-                  ${pkgs.gnutar}/bin/tar cvhaf $out/sword.tar.xz *
+                  ${pkgs.gnutar}/bin/tar cvhaf $out/sword.tar.xz * --transform "s+^+sword/+"
                 '';
             in
             with pkgs.pkgsCross;