--- src/Makevars	2024-03-05 06:33:34.000000000 +0800
+++ src/Makevars	2024-06-19 04:33:11.000000000 +0800
@@ -5,7 +5,9 @@
 PKG_CPPFLAGS += -DBOOST_DISABLE_ASSERTS -DBOOST_PHOENIX_NO_VARIADIC_EXPRESSION -DBOOST_NO_AUTO_PTR -D_REENTRANT -DSTAN_THREADS -DSTRICT_R_HEADERS
 PKG_CXXFLAGS += -DSTRICT_R_HEADERS
 PKG_CPPFLAGS += -DUSE_PTHREAD
+PKG_CPPFLAGS += -I@PREFIX@/include/LegacySupport
 SHLIB_LDFLAGS = $(SHLIB_CXXLDFLAGS)
+SHLIB_LDFLAGS += -L@PREFIX@/lib -lMacportsLegacySupport
 SHLIB_LD = $(SHLIB_CXXLD)
 
 SUNDIALS_CVODES := \