diff --git a/flake.nix b/flake.nix
index a79c9d9..17d6042 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,6 +1,14 @@
-# github.com/brianmcgee has lots of great ideas for going above and beyond for this
+# To update to the newest version of SWORD do the following:
+# * Scroll down to the line where the "rev" is listed
+# * Update that value to match the latest revision of SWORD's SVN trunk
+# * Comment out the hash line below that
+# * Run a `nix build` on the current target
+# * When you receive an error about the hash mismatch, copy the correct value
+#   and paste it into the hash as the new value, then uncomment the hash
+# * Run the build again. It won't need to re-fetch the sources, it will only
+#   execute the build
 {
-  description = "Greg's homepage";
+  description = "Subversion SWORD builds.";
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
     flake-parts.url = "github:hercules-ci/flake-parts";
@@ -61,6 +69,15 @@
           packages =
             let
               win = pkgs.pkgsCross.mingwW64;
+              svnSword = (
+                win.sword.overrideAttrs {
+                  src = pkgs.fetchsvn {
+                    url = "https://svn.crosswire.org/svn/sword/trunk";
+                    rev = "3895";
+                    hash = "sha256-ju6TsfiAUquXbost6PzStHDLfvOJTNON/iSIupi6IOc=";
+                  };
+                }
+              );
             in
             {
               default = pkgs.stdenv.mkDerivation {
@@ -68,7 +85,7 @@
                 phases = [ "installPhase" ];
                 installPhase = ''
                   mkdir -p $out
-                  pushd ${win.sword}
+                  pushd ${svnSword}
                   ${pkgs.gnutar}/bin/tar cvhaf $out/sword.tar.xz *
                 '';
               };