diff --git a/Makefile b/Makefile
index 101e94a..8d49b2d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 COMMON_OPT_FLAGS?= -DFROM_MAIN -march=native -flto \
-	 -march=native -fgraphite -fopenmp -floop-parallelize-all -ftree-parallelize-loops=4 \
+	 -fgraphite -fopenmp -floop-parallelize-all -ftree-parallelize-loops=4 \
 	 -floop-interchange -ftree-loop-distribution -floop-strip-mine -floop-block \
 	 -fno-stack-check -fno-strict-aliasing 
 
diff --git a/Makefile.template b/Makefile.template
index 20f26d3..9d2d821 100644
--- a/Makefile.template
+++ b/Makefile.template
@@ -1,6 +1,6 @@
 
 OPT_FLAGS?= -march=native -flto \
-	 -march=native -fgraphite -fopenmp -floop-parallelize-all -ftree-parallelize-loops=4 \
+	 -fgraphite -fopenmp -floop-parallelize-all -ftree-parallelize-loops=4 \
 	 -floop-interchange -ftree-loop-distribution -floop-strip-mine -floop-block \
 	 -fno-stack-check -fno-strict-aliasing 
 
diff --git a/day9/Makefile b/day9/Makefile
index 6d35555..d35f96e 100644
--- a/day9/Makefile
+++ b/day9/Makefile
@@ -1,7 +1,7 @@
 SRC:= day9.c map.c
 
 OPT_FLAGS?= -march=native -flto \
-	 -march=native -fgraphite -fopenmp -floop-parallelize-all -ftree-parallelize-loops=4 \
+	 -fgraphite -fopenmp -floop-parallelize-all -ftree-parallelize-loops=4 \
 	 -floop-interchange -ftree-loop-distribution -floop-strip-mine -floop-block \
 	 -fno-stack-check -fno-strict-aliasing 
 
@@ -11,7 +11,7 @@ C_OPT_FLAGS=$(OPT_FLAGS)
 CXX_OPT_FLAGS=$(OPT_FLAGS) -felide-constructors -fno-exceptions
 LD_OPT_FLAGS?=-O3 -flto
 
-INCLUDE=../common/include
+INCLUDE?=../common/include
 
 CFLAGS?=$(COMMON_FLAGS) $(C_OPT_FLAGS) --std=gnu11
 CXXFLAGS?=$(COMMON_FLAGS) $(CXX_OPT_FLAGS) --std=gnu++20