diff --git a/README.md b/README.md
index 7a32170..e2a4e10 100644
--- a/README.md
+++ b/README.md
@@ -199,9 +199,10 @@ Rustup をインストールするだけで、Rust とビルドに必要なツ
 ```bash
 git clone https://github.com/kazuki0824/recisdb-rs.git
 cd recisdb-rs
-sudo apt install -y build-essential clang cmake libdvbv5-dev libpcsclite-dev libudev-dev pkg-config
+sudo apt install -y build-essential libclang-dev cmake libdvbv5-dev libpcsclite-dev libudev-dev pkg-config
 cargo build -F dvb --release
 sudo cp -a target/release/recisdb /usr/local/bin
+# cargo install -F dvb --release
 ```
 
 Rust をインストールしたら、上記のコマンドで recisdb をビルドできます。  
diff --git a/b25-sys/build.rs b/b25-sys/build.rs
index 7acc49a..f13f0c6 100644
--- a/b25-sys/build.rs
+++ b/b25-sys/build.rs
@@ -29,10 +29,9 @@ fn prep_cmake(cx: TargetVar) -> cmake::Config {
     let mut cm = cmake::Config::new("./externals/libaribb25");
     cm.very_verbose(true);
 
-    // Enable AVX2 for x64
-    // NEON SIMD is also supported, but not all ARM SoCs support it, so build without it.
+    // Disble AVX2 for x64
     if matches!(cx.arch, Some(ref arch) if arch == "x86_64") {
-        cm.define("USE_AVX2", "ON");
+        cm.define("USE_AVX2", "OFF");
     }
 
     if cx.win {
@@ -74,6 +73,7 @@ fn prep_cmake(cx: TargetVar) -> cmake::Config {
     }
     println!("cargo:rustc-link-lib=static=aribb25");
 
+    #[cfg(not(debug_assertions))]
     cm.profile("Release");
     cm
 }
diff --git a/b25-sys/src/lib.rs b/b25-sys/src/lib.rs
index cbc9d8e..99ad1e8 100644
--- a/b25-sys/src/lib.rs
+++ b/b25-sys/src/lib.rs
@@ -72,7 +72,7 @@ impl StreamDecoder {
             inner
                 .dec
                 .as_ref()
-                .set_simd_mode(if opt.simd { 1 } else { 0 });
+                .set_simd_mode(if opt.simd { 3 } else { 0 });
             inner
         };