diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5165cef..d6c3900 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -72,9 +72,11 @@ target_link_libraries(llvmpym_ext PRIVATE ${llvm_libs} fmt::fmt)
 # although we are going build a full llvm python binding :-
 # TODO for MacOS immitate llvmlite only expose certain symbols. Can it work?
 # https://github.com/numba/llvmlite/blob/78ebf9bf188379b2642112aff388480384306c6b/ffi/CMakeLists.txt#L76C53-L76C61
-set_property(TARGET llvmpym_ext APPEND_STRING PROPERTY LINK_FLAGS "-flto")
-if(NOT APPLE)
-  set_property(TARGET llvmpym_ext APPEND_STRING PROPERTY LINK_FLAGS " -Wl,--exclude-libs,ALL")
+if(UNIX)
+  set_property(TARGET llvmpym_ext APPEND_STRING PROPERTY LINK_FLAGS "-flto")
+  if(NOT APPLE)
+    set_property(TARGET llvmpym_ext APPEND_STRING PROPERTY LINK_FLAGS " -Wl,--exclude-libs,ALL")
+  endif()
 endif()
 
 # Stub Files
diff --git a/pyproject.toml b/pyproject.toml
index 43c361b..188d238 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,7 +44,7 @@ manylinux-x86_64-image = "manylinux_2_28"
 manylinux-aarch64-image = "manylinux_2_28"
 
 [tool.cibuildwheel.windows]
-environment = { SKBUILD_CMAKE_ARGS="-DLLVM_DIR=D:/a/llvmpym/llvmpym/llvm-build/lib/cmake/llvm;-DZLIB_ROOT=$VCPKG_INSTALLATION_ROOT/installed/x64-windows/share/zlib" }
+environment = { SKBUILD_CMAKE_ARGS="-DLLVM_DIR=D:/a/llvmpym/llvmpym/llvm-build/lib/cmake/llvm" }
 
 [tool.cibuildwheel.macos.environment]
 # Needed for full C++17 support
diff --git a/scripts/action/install_llvm.sh b/scripts/action/install_llvm.sh
index 81e237e..d0dc903 100644
--- a/scripts/action/install_llvm.sh
+++ b/scripts/action/install_llvm.sh
@@ -27,7 +27,7 @@ elif [[ "$sys" == "Msys" ]]; then
     root_llvm_dir_name="clang+llvm-18.1.8-x86_64-pc-windows-msvc"
 
     # install libraries
-    vcpkg install zlib
+    # vcpkg install zlib
     
 # MacOS
 elif [[ "$sys" == "Darwin" ]]; then # Mac (only for 14 or later, i.e. apple silicon)
@@ -42,6 +42,3 @@ curl -L -o ./llvm-build.tar.xz "$url"
 tar -xf ./llvm-build.tar.xz
 mv "$root_llvm_dir_name" ./llvm-build
 
-ls
-echo ------------
-ls ./llvm-build