diff --git a/client/apps/fusion-app-loader/package.json b/client/apps/fusion-app-loader/package.json
index d81ebd6e..c59a94dd 100644
--- a/client/apps/fusion-app-loader/package.json
+++ b/client/apps/fusion-app-loader/package.json
@@ -6,7 +6,7 @@
   "main": "src/index.ts",
   "scripts": {
     "prebuild": "rm -f ../../../client/packages/portal-client/src/assets/appLegacyLoader.js",
-    "build": "fusion-framework-cli app build && mv ./dist/app-bundle.js ../../../client/packages/portal-client/src/assets/appLegacyLoader.js",
+    "build:appLoader": "fusion-framework-cli app build && mv ./dist/app-bundle.js ../../../client/packages/portal-client/src/assets/appLegacyLoader.js",
     "build:resources": "tsc && vite build",
     "dev:appLoader": "fusion-framework-cli app dev -c vite.config.js",
     "docker": "cd .. && sh docker-script.sh app-react",
diff --git a/clientBackend.Dockerfile b/clientBackend.Dockerfile
index b0b47343..4ac6d52f 100644
--- a/clientBackend.Dockerfile
+++ b/clientBackend.Dockerfile
@@ -11,6 +11,10 @@ COPY ["/client", "."]
 
 RUN yarn install --frozen-lockfile
 
+# Build the leagasy app laoder
+
+RUN cd client/apps/legacy-app-loader && yarn install --frozen-lockfile && yarn build:appLoader
+
 RUN npx yarn run build
 
 # 2: Build & run web server