--- a/src/Makevars.in	2026-05-29 00:05:55.000000000 +0800
+++ b/src/Makevars.in	2026-06-26 23:41:44.000000000 +0800
@@ -1,5 +1,5 @@
 PKG_CPPFLAGS = -I../src -DSTRICT_R_HEADERS -DRCPP_NO_MASK_RF_ERROR
-PKG_LIBS = -Ls2 -ls2static @libs@
+PKG_LIBS = -Ls2 -ls2static @libs@ -latomic
 PKG_CXXFLAGS = @cflags@ -pthread
 
 CXX_STD = CXX17