diff --git a/PKGBUILD b/PKGBUILD
index cda69eb..15031dd 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -117,9 +117,11 @@ build() {
     -DDESKTOP_APP_DISABLE_WAYLAND_INTEGRATION=OFF \
     -DDESKTOP_APP_DISABLE_X11_INTEGRATION=OFF \
     -DDESKTOP_APP_DISABLE_QT_PLUGINS=OFF \
+    -DCMAKE_C_FLAGS="-flto=1" \
+    -DCMAKE_CXX_FLAGS="-flto=1" \
     -Dtde2e_DIR="${srcdir}/td-${_tdlib_commit}/install/lib/cmake/tde2e"
 
-  cmake --build "${srcdir}/build" --parallel "${CMAKE_BUILD_PARALLEL_LEVEL:-$(nproc)}"
+  cmake --build "${srcdir}/build" --parallel 2
 }
 
 package() {