diff --git a/Cargo.lock b/Cargo.lock
index bca2ebf..5455c72 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -496,7 +496,6 @@ version = "0.2.0"
 dependencies = [
  "anyhow",
  "bytemuck",
- "cc",
  "clap",
  "divan",
  "dunce",
diff --git a/Cargo.toml b/Cargo.toml
index 35ceae1..c8128ee 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -52,6 +52,3 @@ harness = false
 [profile.rwd]
 debug = true
 inherits = "release"
-
-[build-dependencies]
-cc = "1.1.36"
diff --git a/flake.nix b/flake.nix
index f87f1a2..1cf54bb 100644
--- a/flake.nix
+++ b/flake.nix
@@ -77,9 +77,12 @@
         stableToolchainWithLLvmTools = pkgs.rust-bin.stable.latest.default.override {
           extensions = ["rust-src" "llvm-tools"];
         };
-        stableToolchainWithRustAnalyzer = pkgs.rust-bin.stable.latest.default.override {
-          extensions = ["rust-src" "rust-analyzer"];
-        };
+        stableToolchainWithRustAnalyzer = pkgs.rust-bin.stable.latest.default.override ({
+            extensions = ["rust-src" "rust-analyzer"];
+          }
+          // (lib.optionalAttrs pkgs.stdenv.isDarwin {
+            targets = ["aarch64-apple-darwin" "x86_64-apple-darwin"];
+          }));
         craneLib = (crane.mkLib pkgs).overrideToolchain stableToolchain;
         craneLibLLvmTools = (crane.mkLib pkgs).overrideToolchain stableToolchainWithLLvmTools;
 
diff --git a/mnn-sys/Cargo.toml b/mnn-sys/Cargo.toml
index e2dcc79..1aa1b51 100644
--- a/mnn-sys/Cargo.toml
+++ b/mnn-sys/Cargo.toml
@@ -27,11 +27,17 @@ coreml = ["metal"]
 opencl = []
 openmp = []
 opengl = []
+
 mnn-threadpool = []
+
 crt_static = []
 mini-build = []
 sparse-compute = []
 arm82 = []
 bf16 = []
+cpu-weight-dequant-gemm = []
+avx512 = []
+neon = []
+low-memory = []
 
 default = ["mnn-threadpool", "sparse-compute", "opencl"]
diff --git a/mnn-sys/build.rs b/mnn-sys/build.rs
index 074779b..460554e 100644
--- a/mnn-sys/build.rs
+++ b/mnn-sys/build.rs
@@ -172,7 +172,7 @@ fn _main() -> Result<()> {
     } else if *TARGET_OS == "linux" {
         #[cfg(feature = "opencl")]
         {
-            if !pkg_config::probe_library("OpenCL").is_ok() {
+            if pkg_config::probe_library("OpenCL").is_err() {
                 println!("cargo:rustc-link-lib=static=OpenCL");
             };
         }
@@ -822,7 +822,6 @@ fn x86_64<'a>(
         .cpp(true)
         .std("c++11")
         .includes(includes)
-        // .cargo_warnings(false)
         .files(mnn_sse_src)
         .define("MNN_USE_SSE", None)
         .tap_mut(|build| {
diff --git a/mnn-sys/mnn_c/interpreter_c.cpp b/mnn-sys/mnn_c/interpreter_c.cpp
index 2fe130f..0e8da2e 100644
--- a/mnn-sys/mnn_c/interpreter_c.cpp
+++ b/mnn-sys/mnn_c/interpreter_c.cpp
@@ -353,7 +353,7 @@ const char *OperatorInfo_name(const void *op) {
 const char *OperatorInfo_type(const void *op) {
   return reinterpret_cast<const MNN::OperatorInfo *>(op)->type().c_str();
 }
-const float OperatorInfo_flops(const void *op) {
+float OperatorInfo_flops(const void *op) {
   return reinterpret_cast<const MNN::OperatorInfo *>(op)->flops();
 }
 } // extern "C"
diff --git a/mnn-sys/mnn_c/interpreter_c.h b/mnn-sys/mnn_c/interpreter_c.h
index 40c053b..bcd82af 100644
--- a/mnn-sys/mnn_c/interpreter_c.h
+++ b/mnn-sys/mnn_c/interpreter_c.h
@@ -196,7 +196,7 @@ const char *Interpreter_uuid(const Interpreter *interpreter);
 
 const char *OperatorInfo_name(const void *op);
 const char *OperatorInfo_type(const void *op);
-const float OperatorInfo_flops(const void *op);
+float OperatorInfo_flops(const void *op);
 
 #ifdef __cplusplus
 }
diff --git a/mnn-sys/mnn_c/mnndefine.h b/mnn-sys/mnn_c/mnndefine.h
deleted file mode 100644
index e69de29..0000000
diff --git a/src/lib.rs b/src/lib.rs
index dd3cf31..e96abef 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -84,7 +84,7 @@ pub use ffi::MapType;
 pub mod prelude {
     pub use crate::error::*;
     pub(crate) use crate::profile::profile;
+    pub use core::ffi::*;
     pub use core::marker::PhantomData;
     pub use error_stack::{Report, ResultExt};
-    pub use core::ffi::*;
 }