diff --git a/flake.nix b/flake.nix
index 451fab0..45f9327 100644
--- a/flake.nix
+++ b/flake.nix
@@ -35,6 +35,7 @@
           _module.args.pkgs = import inputs.nixpkgs {
             inherit (inputs') system;
           };
+
           devShells.default = pkgs.mkShell {
             # These will just be available
             packages = with pkgs; [ pre-commit ];
@@ -72,8 +73,8 @@
                     win.sword.overrideAttrs {
                       src = pkgs.fetchsvn {
                         url = "https://svn.crosswire.org/svn/sword/trunk";
-                        rev = "3895";
-                        hash = "sha256-ju6TsfiAUquXbost6PzStHDLfvOJTNON/iSIupi6IOc=";
+                        rev = "3900";
+                        hash = "sha256-nNiv0YB7MM7kFplTfVM7x48SMLxHu3Js5Qn5ak583Zk=";
                       };
                     }
                   );
@@ -81,13 +82,15 @@
                 pkgs.writeShellApplication {
                   name = "package-sword";
                   runtimeInputs = with pkgs; [
+                    coreutils
                     gnutar
                     xz
                   ];
                   text = ''
+                    set -x
                     out=$(pwd)
                     pushd ${svnSword}
-                    tar cvhaf "$out/sword.tar.xz" ./* --transform "s+^\\./+sword/+"
+                    tar --mtime="$(date +'%Y-%m-%d')" -cvhaf "$out/sword.tar.xz" ./* --transform "s+^\\./+sword/+"
                   '';
                 };
             in