diff --git a/pkgs/by-name/dd/ddm/0001-Make-findPath-its-calls-behave-well-with-store.patch b/pkgs/by-name/dd/ddm/0001-Make-findPath-its-calls-behave-well-with-store.patch
new file mode 100644
index 000000000000..3dcc79124ec3
--- /dev/null
+++ b/pkgs/by-name/dd/ddm/0001-Make-findPath-its-calls-behave-well-with-store.patch
@@ -0,0 +1,58 @@
+From 3b1bcc92389e8468cd3790dfd223cb653b5f753f Mon Sep 17 00:00:00 2001
+From: OPNA2608 <opna2608@protonmail.com>
+Date: Sun, 16 Mar 2025 19:56:39 +0100
+Subject: [PATCH] Make findPath & its calls behave well with store
+
+- images is a cache of downloaded card images.
+  put that into ~/.cache/ddm/images and allow it to be created.
+- campaigns, cubes & constructed are user-downloaded files that set up possible game styles.
+  create & populate them for the game, and tell it to not try to create them on its own.
+---
+ index.js | 10 +++++-----
+ 1 file changed, 5 insertions(+), 5 deletions(-)
+
+diff --git a/index.js b/index.js
+index 738bfca..3ac32e8 100755
+--- a/index.js
++++ b/index.js
+@@ -75,16 +75,16 @@ app.on('ready', () => {
+         const isDir = fs.statSync(fullPath).isDirectory();
+         if (containsDanger(fullPath)) throw new Error ("Dangerous files detected");
+         if (isDir) return fullPath;
+-    } catch (err) { throw new Error("Bad path Error 1", err); }
++    } catch (err) { throw new Error(`Bad path Error 1: ${err.message}`, err); }
+     
+     else try { //dev
+-      const fullPath = path.join(__dirname, folderName);
++      const fullPath = path.join(allowFolderCreation ? (process.env.HOME + "/.cache/ddm") : __dirname, folderName);
+       if (!fs.existsSync(fullPath) && allowFolderCreation) fs.mkdirSync(fullPath, {recursive: true});
+       const isDir = fs.statSync(fullPath).isDirectory();
+       console.log(fullPath)
+       if (containsDanger(fullPath)) throw new Error (`DDM refused entry to path: ${fullPath}`);
+       if (isDir) return fullPath;
+-    } catch (err) { throw new Error("Bad path Error 2", err); }
++    } catch (err) { throw new Error(`Bad path Error 2: ${err.message}`, err); }
+ 
+   }
+ 
+@@ -108,7 +108,7 @@ app.on('ready', () => {
+ 
+     try {
+       if (!["campaigns", "cubes", "constructed"].includes(folderName)) throw new Error(`bad folder name ${folderName}`);
+-      const folderPath = findPath(folderName, true);
++      const folderPath = findPath(folderName, false);
+       if (!fs.existsSync(folderPath)) fs.mkdirSync(folderPath);
+       const files = fs.readdirSync(folderPath);
+       if (folderName === "campaigns"   ) return files.filter(file => fs.statSync (path.join(folderPath, file)).isDirectory());
+@@ -127,7 +127,7 @@ app.on('ready', () => {
+ 
+   ipcMain.handle('open-local-folder', async (event, folderName) => {
+     if (!["campaigns", "cubes", "constructed"].includes(folderName)) throw new Error(`bad folder name ${constructed}`);
+-    const folderPath = findPath(folderName, true);
++    const folderPath = findPath(folderName, false);
+     try           { shell.openPath(folderPath); } 
+     catch (error) { console.error(error); }
+   });
+-- 
+2.48.1
+
diff --git a/pkgs/by-name/dd/ddm/package.nix b/pkgs/by-name/dd/ddm/package.nix
index ca3cc7af51ec..5443a7b4beec 100644
--- a/pkgs/by-name/dd/ddm/package.nix
+++ b/pkgs/by-name/dd/ddm/package.nix
@@ -2,6 +2,7 @@
   stdenvNoCC,
   lib,
   requireFile,
+  asar,
   copyDesktopItems,
   electron,
   makeDesktopItem,
@@ -10,21 +11,23 @@
 
   campaigns ? [ ],
   cubes ? [ ],
+  constructed ? [ ],
 }:
 
 stdenvNoCC.mkDerivation (finalAttrs: {
   pname = "ddm";
-  version = "3.0.2";
+  version = "4.0.0";
 
   src = requireFile {
     name = "DungeonDuelMonsters-linux-x64.zip";
-    hash = "sha256-APIFQC5k6J0K5Q/e5poW8wKGL67NUbqKTJL4Ohd1K18=";
+    hash = "sha256-Ycy5Cbd4NR/TptVnl5wV154uA0JU0UzIRHTAi/xm0cs=";
     url = "https://mikaygo.itch.io/ddm";
   };
 
   strictDeps = true;
 
   nativeBuildInputs = [
+    asar
     copyDesktopItems
     makeWrapper
     unzip
@@ -39,14 +42,18 @@ stdenvNoCC.mkDerivation (finalAttrs: {
 
       mkdir -p $out/{bin,share/icons/hicolor/512x512/apps,share/ddm}
 
-      mv -t $out/share/ddm/ ./resources/app/*
+      asar extract ./resources/app.asar $out/share/ddm/
+
+      patch -d $out/share/ddm/ -p1 < ${./0001-Make-findPath-its-calls-behave-well-with-store.patch}
+
       ln -s $out/share/ddm/icon.png $out/share/icons/hicolor/512x512/apps/ddm.png
 
       makeWrapper ${lib.getExe electron} $out/bin/ddm \
         --add-flags "\''${NIXOS_OZONE_WL:+\''${WAYLAND_DISPLAY:+--ozone-platform-hint=auto --enable-features=WaylandWindowDecorations --enable-wayland-ime=true}}" \
         --add-flags "$out/share/ddm"
 
-      # Install externally-downloaded campaign packs & cube lists
+      # Install externally-downloaded campaign packs and cube & constructed lists
+      mkdir $out/share/ddm/{campaigns,cubes,constructed}
     ''
     + lib.concatMapStringsSep "\n" (campaignZip: ''
       unzip "${campaignZip}" -d $out/share/ddm/campaigns/
@@ -54,6 +61,9 @@ stdenvNoCC.mkDerivation (finalAttrs: {
     + lib.concatMapStringsSep "\n" (cubeFile: ''
       cp "${cubeFile}" $out/share/ddm/cubes/
     '') cubes
+    + lib.concatMapStringsSep "\n" (constructedFile: ''
+      cp "${constructedFile}" $out/share/ddm/constructed/
+    '') constructed
     + ''
 
       runHook postInstall