diff --git a/Compiler/OpenBLAS/build b/Compiler/OpenBLAS/build
index 09420e5..29c3879 100755
--- a/Compiler/OpenBLAS/build
+++ b/Compiler/OpenBLAS/build
@@ -21,6 +21,7 @@ DRVOPTS  = \$(NOOPT)
 ARCHFLAGS= -ru
 EOF
 	echo "USE_SIMPLE_THREADED_LEVEL3 = 1" >> "${MODULE_SRCDIR}/Makefile.rule"
+	sed -i.bak "s/MACOSX_DEPLOYMENT_TARGET=.*/MACOSX_DEPLOYMENT_TARGET=$MACOSX_DEPLOYMENT_TARGET/" "${MODULE_SRCDIR}/Makefile.system"
 }
 
 pbuild::build() {