diff --git a/pkgs/by-name/on/onlykey/package.nix b/pkgs/by-name/on/onlykey/package.nix
index 8ae4619a7ab9..98220dd8dd2d 100644
--- a/pkgs/by-name/on/onlykey/package.nix
+++ b/pkgs/by-name/on/onlykey/package.nix
@@ -46,11 +46,43 @@ buildNpmPackage (finalAttrs: {
   # should not break other things.
   npmFlags = [ "--ignore-scripts" ];
 
+  postPatch = ''
+    # NW.js 0.102 in Chrome-packaged-app mode never advances
+    # document.readyState past "loading", so DOMContentLoaded and load
+    # events never fire and the wizard UI never initializes (the window
+    # only shows the page background and the "Last message received"
+    # footer text). Dispatch the events manually after the bottom-of-body
+    # scripts have registered their listeners.
+    substituteInPlace app/app.html \
+      --replace-fail \
+        '<script src="/scripts/dialog-links.js"></script>' \
+        '<script src="/scripts/dialog-links.js"></script>
+    <script>setTimeout(() => { document.dispatchEvent(new Event("DOMContentLoaded")); window.dispatchEvent(new Event("load")); }, 0);</script>'
+
+    # The app should not create autostart entries on first launch.
+    substituteInPlace app/app.js \
+      --replace-fail \
+        "} else if (!localStorage.hasOwnProperty('autoLaunch')) {" \
+        "} else if (false && !localStorage.hasOwnProperty('autoLaunch')) {"
+  '';
+
+  postBuild = ''
+    substituteInPlace build/package.json \
+      --replace-fail '"name": "OnlyKey-dev"' '"name": "OnlyKey"' \
+      --replace-fail '"toolbar": true' '"toolbar": false'
+  '';
+
   installPhase = ''
     runHook preInstall
 
+    rm -rf node_modules
+    npm ci --omit=dev --omit=optional --ignore-scripts
+    rm -rf node_modules/nw
+    rm -f node_modules/.bin/nw
+
     mkdir -p "$out/share"
     cp -r build "$out/share/onlykey"
+    cp -r node_modules "$out/share/onlykey/node_modules"
 
     ln -s "${finalAttrs.desktopItem}/share/applications" "$out/share/applications"