diff --git a/pkgs/tools/networking/ratman/default.nix b/pkgs/tools/networking/ratman/default.nix
index e2b2966f78b..5ddab7850fa 100644
--- a/pkgs/tools/networking/ratman/default.nix
+++ b/pkgs/tools/networking/ratman/default.nix
@@ -1,22 +1,30 @@
 { lib
-, fetchurl
+, fetchFromGitLab
 , installShellFiles
 , libsodium
 , pkg-config
 , protobuf
 , rustPlatform
+, fetchYarnDeps
+, fixup_yarn_lock
+, stdenv
+, yarn
+, nodejs
 }:
 
 rustPlatform.buildRustPackage rec {
   pname = "ratman";
-  version = "0.3.1";
+  version = "0.4.0";
 
-  src = fetchurl {
-    url = "https://git.irde.st/we/irdest/-/archive/${pname}-${version}/irdest-${pname}-${version}.tar.gz";
-    sha256 = "0x1wvhsmf7m55j9hmirkz75qivsg33xab1sil6nbv8fby428fpq6";
+  src = fetchFromGitLab {
+    domain = "git.irde.st";
+    owner = "we";
+    repo = "irdest";
+    rev = "${pname}-${version}";
+    sha256 = "sha256-ZZ7idZ67xvQFmQJqIFU/l77YU+yDQOqNthX5NR/l4k8=";
   };
 
-  cargoSha256 = "1dkfyy1z34qaavyd3f20hrrrb3kjsdfkyzd535xlds9wivgchmd0";
+  cargoSha256 = "Nsux0QblBtzlhLEgfKYvkQrOz8+oVd2pqT3CL8TnQEc=";
 
   nativeBuildInputs = [ protobuf pkg-config installShellFiles ];
 
@@ -31,6 +39,50 @@ rustPlatform.buildRustPackage rec {
 
   SODIUM_USE_PKG_CONFIG = 1;
 
+  dashboard = stdenv.mkDerivation rec {
+    pname = "ratman-dashboard";
+    inherit version src;
+    sourceRoot = "source/ratman/dashboard";
+
+    yarnDeps = fetchYarnDeps {
+      yarnLock = src + "/ratman/dashboard/yarn.lock";
+      sha256 = "sha256-pWjKL41r/bTvWv+5qCgCFVL9+o64BiV2/ISdLeKEOqE=";
+    };
+
+    nativeBuildInputs = [ yarn nodejs ];
+
+    outputs = [ "out" "dist" ];
+
+    buildPhase = ''
+      # Yarn writes temporary files to $HOME. Copied from mkYarnModules.
+      export HOME=$NIX_BUILD_TOP/yarn_home
+
+      # Make yarn install packages from our offline cache, not the registry
+      yarn config --offline set yarn-offline-mirror ${yarnDeps}
+
+      # Fixup "resolved"-entries in yarn.lock to match our offline cache
+      ${fixup_yarn_lock}/bin/fixup_yarn_lock yarn.lock
+
+      yarn install --offline --frozen-lockfile --ignore-scripts --no-progress --non-interactive
+
+      patchShebangs node_modules/
+
+      # Build into `./dist/`, suppress formatting.
+      yarn --offline build | cat
+    '';
+
+    installPhase = ''
+      cp -R . $out
+
+      mv $out/dist $dist
+      ln -s $dist $out/dist
+    '';
+  };
+
+  prePatch = ''
+    cp -r ${dashboard.dist} ratman/dashboard/dist
+  '';
+
   meta = with lib; {
     description = "A modular decentralised peer-to-peer packet router and associated tools";
     homepage = "https://git.irde.st/we/irdest";