diff --git a/pkgs/servers/rmfakecloud/default.nix b/pkgs/servers/rmfakecloud/default.nix
index db4b335e666f..4b84ca3e3567 100644
--- a/pkgs/servers/rmfakecloud/default.nix
+++ b/pkgs/servers/rmfakecloud/default.nix
@@ -1,4 +1,4 @@
-{ lib, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule, callPackage, enableWebui ? true }:
 
 buildGoModule rec {
   pname = "rmfakecloud";
@@ -13,8 +13,12 @@ buildGoModule rec {
 
   vendorSha256 = "sha256-NwDaPpjkQogXE37RGS3zEALlp3NuXP9RW//vbwM6y0A=";
 
-  postPatch = ''
-    # skip including the JS SPA, which is difficult to build
+  ui = callPackage ./webui.nix { inherit version src; };
+
+  postPatch = if enableWebui then ''
+    mkdir -p ui/build
+    cp -r ${ui}/* ui/build
+  '' else ''
     sed -i '/go:/d' ui/assets.go
   '';
 
diff --git a/pkgs/servers/rmfakecloud/webui.nix b/pkgs/servers/rmfakecloud/webui.nix
new file mode 100644
index 000000000000..8b636baec115
--- /dev/null
+++ b/pkgs/servers/rmfakecloud/webui.nix
@@ -0,0 +1,37 @@
+{ version, src, stdenv, lib, fetchFromGitHub, fetchYarnDeps, fixup_yarn_lock, yarn, nodejs }:
+
+stdenv.mkDerivation rec {
+  inherit version src;
+
+  pname = "rmfakecloud-webui";
+
+  yarnOfflineCache = fetchYarnDeps {
+    yarnLock = "${src}/ui/yarn.lock";
+    sha256 = "sha256-lKA3W7gXT2Dnux+sIXCluG5HxkGQgHPnCjgV/a4pjY0=";
+  };
+
+  nativeBuildInputs = [ fixup_yarn_lock yarn nodejs ];
+
+  buildPhase = ''
+    export HOME=$(mktemp -d)
+    cd ui
+    fixup_yarn_lock yarn.lock
+    yarn config --offline set yarn-offline-mirror ${yarnOfflineCache}
+    yarn install --offline --frozen-lockfile --ignore-engines --ignore-scripts --no-progress
+    patchShebangs node_modules
+    export PATH=$PWD/node_modules/.bin:$PATH
+    ./node_modules/.bin/react-scripts build
+    mkdir -p $out
+    cd ..
+  '';
+
+  installPhase = ''
+    cp -r ui/build/* $out
+  '';
+
+  meta = with lib; {
+    description = "Only the webui files for rmfakecloud";
+    homepage = "https://ddvk.github.io/rmfakecloud/";
+    license = licenses.agpl3Only;
+  };
+}