diff --git a/c_src/Makefile b/c_src/Makefile
index 76121c4..1eb0292 100644
--- a/c_src/Makefile
+++ b/c_src/Makefile
@@ -70,11 +70,11 @@ HAVE_FORMAT ?= $(C20_FEATURES)
 HAVE_SRCLOC ?= $(C20_FEATURES)
 
 ifeq ($(UNAME_SYS),linux)
-  ifeq ($(shell gcc -march=native -dM -E - </dev/null | awk '/__AVX2__/ { print $$3 }'),1)
-    CXXFLAGS += -mavx2
-  else ifeq ($(shell gcc -march=native -dM -E - </dev/null | awk '/__AVX__/ { print $$3 }'),1)
-    CXXFLAGS += -mavx
-  endif
+  #ifeq ($(shell gcc -march=native -dM -E - </dev/null | awk '/__AVX2__/ { print $$3 }'),1)
+  #  CXXFLAGS += -mavx2
+  #else ifeq ($(shell gcc -march=native -dM -E - </dev/null | awk '/__AVX__/ { print $$3 }'),1)
+  #  CXXFLAGS += -mavx
+  #endif
 
   SYSROOT  := $(shell $(CXX) -print-sysroot)
   CXXFLAGS += -DHAVE_SETRESUID -DHAVE_PIPE2 $(X64)