diff --git a/pkgs/games/r2modman/default.nix b/pkgs/games/r2modman/default.nix
new file mode 100644
index 00000000000..624d1e2f8ee
--- /dev/null
+++ b/pkgs/games/r2modman/default.nix
@@ -0,0 +1,113 @@
+{ lib
+, stdenv
+, yarn
+, fetchYarnDeps
+, fixup_yarn_lock
+, nodejs
+, electron
+, fetchFromGitHub
+, gitUpdater
+, makeWrapper
+, makeDesktopItem
+, copyDesktopItems
+}:
+
+stdenv.mkDerivation rec {
+  pname = "r2modman";
+  version = "3.1.42";
+
+  src = fetchFromGitHub {
+    owner = "ebkr";
+    repo = "r2modmanPlus";
+    rev = "v${version}";
+    hash = "sha256-16sE706iivYoI40JJUkqVmtxkYsgAFBg+0tXOc6scqc=";
+  };
+
+  offlineCache = fetchYarnDeps {
+    yarnLock = "${src}/yarn.lock";
+    hash = "sha256-CXitb/b2tvTfrkFrFv4KP4WdmMg+1sDtC/s2u5ezDfI=";
+  };
+
+  nativeBuildInputs = [
+    yarn
+    fixup_yarn_lock
+    nodejs
+    makeWrapper
+    copyDesktopItems
+  ];
+
+  configurePhase = ''
+    runHook preConfigure
+
+    # Workaround for webpack bug
+    # https://github.com/webpack/webpack/issues/14532
+    export NODE_OPTIONS="--openssl-legacy-provider"
+    export HOME=$(mktemp -d)
+    yarn config --offline set yarn-offline-mirror $offlineCache
+    fixup_yarn_lock yarn.lock
+    yarn install --offline --frozen-lockfile --ignore-platform --ignore-scripts --no-progress --non-interactive
+    patchShebangs node_modules/
+
+    runHook postConfigure
+  '';
+
+  buildPhase = ''
+    runHook preBuild
+
+    yarn --offline quasar build --mode electron --skip-pkg
+
+    # Remove dev dependencies.
+    yarn install --production --offline --frozen-lockfile --ignore-platform --ignore-scripts --no-progress --non-interactive
+
+    runHook postBuild
+  '';
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/share/r2modman
+    cp -r dist/electron/UnPackaged/. node_modules $out/share/r2modman
+
+    (
+      cd public/icons
+      for img in *png; do
+        dimensions=''${img#favicon-}
+        dimensions=''${dimensions%.png}
+        mkdir -p $out/share/icons/hicolor/$dimensions/apps
+        cp $img $out/share/icons/hicolor/$dimensions/apps/${pname}.png
+      done
+    )
+
+    makeWrapper '${electron}/bin/electron' "$out/bin/r2modman" \
+      --inherit-argv0 \
+      --add-flags "$out/share/r2modman" \
+      --add-flags "\''${NIXOS_OZONE_WL:+\''${WAYLAND_DISPLAY:+--ozone-platform-hint=auto --enable-features=WaylandWindowDecorations}}"
+
+    runHook postInstall
+  '';
+
+  desktopItems = [
+    (makeDesktopItem {
+      name = pname;
+      exec = pname;
+      icon = pname;
+      desktopName = pname;
+      comment = meta.description;
+      categories = [ "Game" ];
+      keywords = [ "launcher" "mod manager" "thunderstore" ];
+    })
+  ];
+
+  passthru.updateScript = gitUpdater {
+    rev-prefix = "v";
+  };
+
+  meta = with lib; {
+    description = "Unofficial Thunderstore mod manager";
+    homepage = "https://github.com/ebkr/r2modmanPlus";
+    changelog = "https://github.com/ebkr/r2modmanPlus/releases/tag/v${version}";
+    license = licenses.mit;
+    maintainers = with maintainers; [ aidalgol huantian ];
+    inherit (electron.meta) platforms;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index c5aefc8bace..0082fad6454 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -36542,6 +36542,8 @@ with pkgs;
 
   r2mod_cli = callPackage ../games/r2mod_cli { };
 
+  r2modman = callPackage ../games/r2modman { };
+
   racer = callPackage ../games/racer { };
 
   randtype = callPackage ../games/randtype { };