--- src/third_party/mozjs/SConscript.orig	2026-06-16 06:40:34 UTC
+++ src/third_party/mozjs/SConscript
@@ -157,7 +157,7 @@ if get_option('spider-monkey-dbg') == "on":
 if get_option('spider-monkey-dbg') == "on":
     sources.append("extract/js/src/util/Utility.cpp")
 
-if env['TARGET_ARCH'] == 'x86_64' and not env.TargetOSIs('windows'):
+if False and env['TARGET_ARCH'] == 'x86_64' and not env.TargetOSIs('windows'):
     env.Append(CCFLAGS=['-mavx2'])
     sources.extend(["extract/mozglue/misc/SIMD_avx2.cpp", "extract/mozglue/misc/SSE.cpp"])