diff --git a/CMakeLists.txt b/CMakeLists.txt
index 46bae23..617b2e7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,17 +4,8 @@ project(msquic-asio LANGUAGES)
 
 set(_msquic_version "v2.4.5")
 set(_win_pkg_url "https://github.com/microsoft/msquic/releases/download/${_msquic_version}/msquic_windows_x64_Release_schannel.zip")
-set(_linux_pkg_url "https://github.com/microsoft/msquic/releases/download/${_msquic_version}/msquic_linux_x64_Release_openssl.zip")
-if(WIN32)
-  set(release_url ${_win_pkg_url})
-else()
-  # linux
-  set(release_url ${_linux_pkg_url})
-  find_package(OpenSSL REQUIRED)
-  # openssl needs version 1.1. ubuntu 20.04 has it, 22.04 is too new.
-endif(WIN32)
-
 if(WIN32)
+set(release_url ${_win_pkg_url})
 message(STATUS "fetching msquic_release " ${release_url})
 include(FetchContent)
 FetchContent_Declare(
@@ -25,17 +16,6 @@ FetchContent_Declare(
 FetchContent_MakeAvailable(msquic_release)
 endif(WIN32)
 
-# fetch linux pkg as well on windows for binding generation
-if(WIN32)
-message(STATUS "fetching msquic_linux_release " ${_linux_pkg_url})
-FetchContent_Declare(
-  msquic_linux_release
-  DOWNLOAD_EXTRACT_TIMESTAMP true
-  URL ${_linux_pkg_url}
-)
-FetchContent_MakeAvailable(msquic_linux_release)
-endif(WIN32)
-
 if(WIN32)
 # generate winmd. defer generation task in .metadata csproj.
 find_program (
@@ -74,34 +54,6 @@ add_custom_target(generate_rust
   WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
 )
 
-else(WIN32)
-  # file(GLOB _msquic_dll 
-  #   ${msquic_release_SOURCE_DIR}/bin/libmsquic.so.*
-  # )
-  # # create a sym link
-  # execute_process(
-  #   # for build
-  #   COMMAND ln -sf ${_msquic_dll} ${CMAKE_BINARY_DIR}/libmsquic.so # for linking
-  #   COMMAND ln -sf ${_msquic_dll} ${CMAKE_BINARY_DIR}/libmsquic.so.2 # for loading at runtime
-  #   # for run
-  #   COMMAND mkdir -p ${CMAKE_SOURCE_DIR}/target/debug/deps
-  #   COMMAND cp ${_msquic_dll} ${CMAKE_SOURCE_DIR}/target/debug/libmsquic.so.2
-  #   COMMAND cp ${_msquic_dll} ${CMAKE_SOURCE_DIR}/target/debug/deps/libmsquic.so.2
-  # )
-  # copy files to output dir
-  # file(COPY ${_msquic_dll} DESTINATION ${CMAKE_SOURCE_DIR}/target/debug)
-endif(WIN32)
-
-# downloading the msquic rust manual bindings.
-
-# message(STATUS "download msquic_bind")
-# file(DOWNLOAD
-#   https://raw.githubusercontent.com/microsoft/msquic/v2.3.5/src/lib.rs
-#   ${CMAKE_CURRENT_SOURCE_DIR}/crates/libs/c2/src/lib.rs
-#   TLS_VERIFY ON
-# )
-
-if(WIN32)
 # generate cert on windows:
 find_program(pwsh_exe
   NAMES pwsh.exe
diff --git a/README.md b/README.md
index 010a691..1b52e90 100644
--- a/README.md
+++ b/README.md
@@ -5,5 +5,21 @@ Experimental.
 
 Currently can run h3 client and server.
 
+# Build
+msquic lib is dynamically loaded and it is not required for building the rust code.
+
+# Test and run
+## Posix
+Install msquic pkg:
+```sh
+sudo apt-get install libmsquic
+```
+Rust code will load the lib dynamically.
+## Windows
+pwsh 7 packages the msquic.dll. If you install pwsh 7, rust will load it from there.
+
+## Other
+You can download msquic from github release [here](https://github.com/microsoft/msquic/releases) and put the lib to locations where app can load it.
+
 # License
 This project is licensed under the MIT license.
\ No newline at end of file
diff --git a/crates/libs/msquic-rs/build.rs b/crates/libs/msquic-rs/build.rs
deleted file mode 100644
index 6158e03..0000000
--- a/crates/libs/msquic-rs/build.rs
+++ /dev/null
@@ -1,30 +0,0 @@
-// ------------------------------------------------------------
-// Copyright 2024 Youyuan Wu
-// Licensed under the MIT License (MIT). See License in the repo root for
-// license information.
-// ------------------------------------------------------------
-
-use std::{env, path::Path};
-
-fn main() {
-    let pkg_dir = String::from("build/_deps/msquic_release-src");
-    let package_root = env::var("CARGO_MANIFEST_DIR").unwrap();
-    let project_root = package_root + "/../../../";
-    let abs_search_dir;
-    if cfg!(windows) {
-        // add link dir for msquic support lib. This is propagated to downstream targets
-        abs_search_dir = project_root + &pkg_dir + "/lib";
-    } else if cfg!(unix) {
-        abs_search_dir = project_root + "build";
-        // apt pkg dir
-        println!("cargo:rustc-link-search=native=/usr/lib/x86_64-linux-gnu");
-    } else {
-        panic!("unsupport platform")
-    }
-    println!(
-        "cargo:rustc-link-search=native={}",
-        Path::new(&abs_search_dir).display()
-    );
-    // This does not work for cargo test
-    // println!("cargo:rustc-env=LD_LIBRARY_PATH={}", abs_search_dir);
-}
diff --git a/crates/libs/msquic-rs/src/load.rs b/crates/libs/msquic-rs/src/load.rs
index 0aedfe7..368ff5e 100644
--- a/crates/libs/msquic-rs/src/load.rs
+++ b/crates/libs/msquic-rs/src/load.rs
@@ -15,5 +15,5 @@ lazy_static::lazy_static! {
   pub static ref MsQuicOpenVersion: libloading::Symbol<'static,unsafe extern "C" fn(u32, *mut *mut QUIC_API_TABLE) -> i32>
     = unsafe { LIB.get(b"MsQuicOpenVersion") }.expect("cannot load open fn");
   pub static ref MsQuicClose: libloading::Symbol<'static, unsafe extern "C" fn(*const QUIC_API_TABLE)>
-    = unsafe { LIB.get(b"MsQuicClose") }.expect("cannot load open fn");
+    = unsafe { LIB.get(b"MsQuicClose") }.expect("cannot load close fn");
 }