diff -up audacity-minsrc-2.4.2/lib-src/lame/libmp3lame/fft.c.nosse audacity-minsrc-2.4.2/lib-src/lame/libmp3lame/fft.c
--- audacity-minsrc-2.4.2/lib-src/lame/libmp3lame/fft.c.nosse	2020-05-30 13:55:53.000000000 +0200
+++ audacity-minsrc-2.4.2/lib-src/lame/libmp3lame/fft.c	2020-06-30 03:38:16.533894307 +0200
@@ -38,6 +38,9 @@
 # include <config.h>
 #endif
 
+#undef HAVE_XMMINTRIN_H
+#undef MIN_ARCH_SSE
+
 #include "lame.h"
 #include "machine.h"
 #include "encoder.h"
diff -up audacity-minsrc-2.4.2/lib-src/lame/libmp3lame/lame.c.nosse audacity-minsrc-2.4.2/lib-src/lame/libmp3lame/lame.c
--- audacity-minsrc-2.4.2/lib-src/lame/libmp3lame/lame.c.nosse	2020-05-30 13:55:53.000000000 +0200
+++ audacity-minsrc-2.4.2/lib-src/lame/libmp3lame/lame.c	2020-06-30 03:42:10.252522407 +0200
@@ -30,6 +30,8 @@
 # include <config.h>
 #endif
 
+#undef HAVE_XMMINTRIN_H
+#undef MIN_ARCH_SSE
 
 #include "lame.h"
 #include "machine.h"
diff -up audacity-minsrc-2.4.2/lib-src/lame/libmp3lame/quantize.c.nosse audacity-minsrc-2.4.2/lib-src/lame/libmp3lame/quantize.c
--- audacity-minsrc-2.4.2/lib-src/lame/libmp3lame/quantize.c.nosse	2020-06-30 03:41:26.437217187 +0200
+++ audacity-minsrc-2.4.2/lib-src/lame/libmp3lame/quantize.c	2020-06-30 03:41:36.109284564 +0200
@@ -28,6 +28,9 @@
 # include <config.h>
 #endif
 
+#undef HAVE_XMMINTRIN_H
+#undef MIN_ARCH_SSE
+
 #include "lame.h"
 #include "machine.h"
 #include "encoder.h"
diff -up audacity-minsrc-2.4.2/lib-src/lame/libmp3lame/vector/xmm_quantize_sub.c.nosse audacity-minsrc-2.4.2/lib-src/lame/libmp3lame/vector/xmm_quantize_sub.c
--- audacity-minsrc-2.4.2/lib-src/lame/libmp3lame/vector/xmm_quantize_sub.c.nosse	2020-05-30 13:55:53.000000000 +0200
+++ audacity-minsrc-2.4.2/lib-src/lame/libmp3lame/vector/xmm_quantize_sub.c	2020-06-30 03:41:10.710107631 +0200
@@ -24,6 +24,9 @@
 # include <config.h>
 #endif
 
+#undef HAVE_XMMINTRIN_H
+#undef MIN_ARCH_SSE
+
 #include "lame.h"
 #include "machine.h"
 #include "encoder.h"