diff --git a/Rsconscript b/Rsconscript
index c4b7220..872c7e0 100644
--- a/Rsconscript
+++ b/Rsconscript
@@ -105,7 +105,34 @@ hulk_env = env "hulk", use: %w[ldc2 x86_64-elf-gcc] do |env|
               "fontgen" => fontgen_env.expand("^/fontgen"))
   env["sources"] = glob("src/hulk/**/*.d")
   env["sources"] << "^/src/hulk/kfont.d"
-  env["DFLAGS"] += %w[-mtriple=x86_64-unknown-elf --betterC -release -O3 --wi --enable-cross-module-inlining -code-model=large]
+  cpu_attrs = %w[
+    -avx
+    -avx2
+    -avx512bf16
+    -avx512bitalg
+    -avx512bw
+    -avx512cd
+    -avx512dq
+    -avx512er
+    -avx512f
+    -avx512ifma
+    -avx512pf
+    -avx512vbmi
+    -avx512vbmi2
+    -avx512vl
+    -avx512vnni
+    -avx512vp2intersect
+    -avx512vpopcntdq
+    -sse
+    -sse-unaligned-mem
+    -sse2
+    -sse3
+    -sse4.1
+    -sse4.2
+    -sse4a
+    -ssse3
+  ]
+  env["DFLAGS"] += %W[-mtriple=x86_64-unknown-elf -mattr=#{cpu_attrs.join(",")} --betterC -release -O3 --wi --enable-cross-module-inlining -code-model=large]
   env["D_IMPORT_PATH"] += %w[src]
   env["D_IMPORT_PATH"] << env.expand("^/src")
   env["LD"] = "x86_64-elf-gcc"
diff --git a/src/hulk/hulk.d b/src/hulk/hulk.d
index 2feb11e..a02332b 100644
--- a/src/hulk/hulk.d
+++ b/src/hulk/hulk.d
@@ -42,8 +42,6 @@ private void initialize_cpu()
     write_cr4(read_cr4() | CR4_OSFXSR | CR4_OSXMMEXCPT);
     /* 2. Enable OSXSAVE. */
     write_cr4(read_cr4() | CR4_OSXSAVE);
-    /* 3. Enable AVX. */
-//    xsetbv(0u, xgetbv(0u) | XCR0_X87 | XCR0_SSE | XCR0_AVX);
 }
 
 /**