diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 8024a15..a5937f3 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -63,7 +63,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        msrv: [1.64]
+        msrv: [1.68]
     steps:
       - uses: actions/checkout@v4
         with:
diff --git a/windivert-sys/Cargo.toml b/windivert-sys/Cargo.toml
index e76457a..96aa3c2 100644
--- a/windivert-sys/Cargo.toml
+++ b/windivert-sys/Cargo.toml
@@ -28,13 +28,11 @@ thiserror = "1"
 
 [dependencies.windows]
 version = "0.48"
-features = [
-    "Win32_Foundation",
-    "Win32_System_IO",
-]
+features = ["Win32_Foundation", "Win32_System_IO"]
 
 [build-dependencies]
+path_macro2 = "0.1.3"
 cc = "1.0"
 
 [package.metadata.docs.rs]
-default-target = "x86_64-pc-windows-msvc"
\ No newline at end of file
+default-target = "x86_64-pc-windows-msvc"
diff --git a/windivert-sys/build/compile/gnu.rs b/windivert-sys/build/compile/gnu.rs
index bbe6315..9f7d6a6 100644
--- a/windivert-sys/build/compile/gnu.rs
+++ b/windivert-sys/build/compile/gnu.rs
@@ -1,4 +1,5 @@
 use cc::Build;
+use path_macro2::{path, path_const};
 use std::process::{Command, Stdio};
 use std::{env, fs};
 
@@ -8,8 +9,8 @@ pub fn lib() {
 
     build
         .out_dir(&out_dir)
-        .include(r#"vendor\include"#)
-        .file(r#"vendor\dll\windivert.c"#);
+        .include(path_const!(vendor / include))
+        .file(path_const!(vendor / dll / windivert.c));
 
     build.compile("WinDivert");
 }
@@ -28,16 +29,16 @@ pub fn dll() {
     };
     cmd.args(DYNAMIC_C_OPTIONS);
     cmd.arg(format!("-Wl,--entry=${mangle}WinDivertDllEntry"));
-    cmd.args(["-c", "vendor/dll/windivert.c"]);
-    cmd.args(["-o", &format!("{out_dir}/WinDivert.o")]);
+    cmd.args(["-c", path_const!(vendor / dll / windivert.c)]);
+    cmd.args(["-o", &path!({ out_dir } / WinDivert.o).to_string_lossy()]);
     cmd.output().expect("Error compiling windivert c library");
 
     let mut cmd = Build::new().get_compiler().to_command();
     cmd.args(DYNAMIC_C_OPTIONS);
-    cmd.args(["-o", &format!("{out_dir}/WinDivert.dll")]);
+    cmd.args(["-o", &path!({ out_dir } / WinDivert.dll).to_string_lossy()]);
     cmd.args([
-        &format!("{out_dir}/WinDivert.o"),
-        "vendor/dll/windivert.def",
+        &path!({ out_dir } / WinDivert.o).to_string_lossy(),
+        path_const!(vendor / dll / windivert.def),
         "-nostdlib",
     ]);
     cmd.args(DYNAMIC_C_INCLUDES);
@@ -52,7 +53,7 @@ pub fn dll() {
     let mut strip = Command::new(strip);
     strip.stdout(Stdio::inherit()).stderr(Stdio::inherit());
 
-    strip.arg(&format!("{out_dir}/WinDivert.dll"));
+    strip.arg(path!({ out_dir } / WinDivert.dll));
     let _ = strip.output().expect("Error striping windivert dll");
 
     let dlltool = Build::new()
@@ -62,13 +63,19 @@ pub fn dll() {
         .replace("gcc", "dlltool");
     let mut dlltool = Command::new(dlltool);
     dlltool.stdout(Stdio::inherit()).stderr(Stdio::inherit());
-
-    dlltool.args(["--dllname", &format!("{out_dir}/WinDivert.dll")]);
-    dlltool.args(["--def", "vendor/dll/windivert.def"]);
-    dlltool.args(["--output-lib", &format!("{out_dir}/WinDivert.lib")]);
+    dlltool.args([
+        "--dllname",
+        &path!({ out_dir } / WinDivert.dll).to_string_lossy(),
+    ]);
+    dlltool.args(["--def", path_const!(vendor / dll / windivert.def)]);
+    dlltool.args([
+        "--output-lib",
+        &path!({ out_dir } / WinDivert.lib).to_string_lossy(),
+    ]);
     let _ = dlltool.output().expect("Error building windivert lib");
 
-    let _ = fs::remove_file(format!("{out_dir}/WinDivert.o"));
+    // Clean up object file
+    let _ = fs::remove_file(path!({ out_dir } / WinDivert.o));
 }
 
 const DYNAMIC_C_OPTIONS: &[&str] = &[
@@ -77,7 +84,7 @@ const DYNAMIC_C_OPTIONS: &[&str] = &[
     r#"-Wall"#,
     r#"-Wno-pointer-to-int-cast"#,
     r#"-Os"#,
-    r#"-Ivendor/include/"#,
+    concat!("-I", path_const!(vendor / include /)),
     r#"-Wl,--enable-stdcall-fixup"#,
 ];
 
diff --git a/windivert-sys/build/compile/msvc.rs b/windivert-sys/build/compile/msvc.rs
index 950f300..752b3b8 100644
--- a/windivert-sys/build/compile/msvc.rs
+++ b/windivert-sys/build/compile/msvc.rs
@@ -1,4 +1,5 @@
 use cc::Build;
+use path_macro2::{path, path_const};
 use std::{env, fs};
 
 use crate::DLL_OUTPUT_PATH_ARG;
@@ -9,8 +10,8 @@ pub fn lib() {
 
     build
         .out_dir(&out_dir)
-        .include(r#"vendor\include"#)
-        .file(r#"vendor\dll\windivert.c"#);
+        .include(path_const!(vendor / include))
+        .file(path_const!(vendor / dll / windivert.c));
 
     for &flag in STATIC_CL_ARGS {
         build.flag(flag);
@@ -34,9 +35,18 @@ pub fn dll() {
 
     compiler.arg(&format!("/MACHINE:{arch}"));
 
-    compiler.arg(&format!(r#"/PDB:{out_dir}\WinDivertDll.pdb"#));
-    compiler.arg(&format!(r#"/OUT:{out_dir}\WinDivert.dll"#));
-    compiler.arg(&format!(r#"/IMPLIB:{out_dir}\WinDivert.lib"#));
+    compiler.arg(&format!(
+        "/PDB:{}",
+        &path!({ out_dir } / WinDivertDll.pdb).to_string_lossy()
+    ));
+    compiler.arg(&format!(
+        "/OUT:{}",
+        &path!({ out_dir } / WinDivert.dll).to_string_lossy()
+    ));
+    compiler.arg(&format!(
+        "/IMPLIB:{}",
+        &path!({ out_dir } / WinDivert.lib).to_string_lossy()
+    ));
 
     if let Ok(out) = compiler.output() {
         if !out.status.success() {
@@ -52,12 +62,12 @@ pub fn dll() {
 
     if let Ok(dylib_save_dir) = env::var(DLL_OUTPUT_PATH_ARG) {
         let _ = fs::copy(
-            format!(r#"{out_dir}\WinDivert.dll"#),
-            format!(r#"{dylib_save_dir}\WinDivert.dll"#),
+            path!({ out_dir } / WinDivert.dll),
+            path!({ dylib_save_dir } / WinDivert.dll),
         );
         let _ = fs::copy(
-            format!(r#"{out_dir}\WinDivert.lib"#),
-            format!(r#"{dylib_save_dir}\WinDivert.lib"#),
+            path!({ out_dir } / WinDivert.lib),
+            path!({ dylib_save_dir } / WinDivert.lib),
         );
     } else {
         println!("cargo:warning=Environment variable {DLL_OUTPUT_PATH_ARG} not found, compiled dll & lib files will be stored on {out_dir}");
@@ -65,7 +75,7 @@ pub fn dll() {
 }
 
 const DYNAMIC_CL_ARGS: &[&str] = &[
-    r#"/Ivendor\include"#,
+    concat!("/I", path_const!(vendor / include)),
     r#"/ZI"#,
     r#"/JMC"#,
     r#"/nologo"#,
@@ -86,7 +96,7 @@ const DYNAMIC_CL_ARGS: &[&str] = &[
     r#"/TC"#,
     r#"/FC"#,
     r#"/errorReport:queue"#,
-    r#"vendor\dll\windivert.c"#,
+    path_const!(vendor / dll / windivert.c),
     r#"/link"#,
     r#"/ERRORREPORT:QUEUE"#,
     r#"/INCREMENTAL"#,
@@ -94,7 +104,7 @@ const DYNAMIC_CL_ARGS: &[&str] = &[
     r#"kernel32.lib"#,
     r#"advapi32.lib"#,
     r#"/NODEFAULTLIB"#,
-    r#"/DEF:vendor/dll/windivert.def"#,
+    concat!("/DEF:", path_const!(vendor / dll / windivert.def)),
     r#"/MANIFEST"#,
     r#"/manifest:embed"#,
     r#"/DEBUG:FASTLINK"#,
diff --git a/windivert-sys/build/main.rs b/windivert-sys/build/main.rs
index 21468c5..641d0a7 100644
--- a/windivert-sys/build/main.rs
+++ b/windivert-sys/build/main.rs
@@ -1,5 +1,6 @@
 mod compile;
 
+use path_macro2::path;
 use std::{env, fs};
 
 pub const LIB_PATH_ARG: &str = "WINDIVERT_PATH";
@@ -26,6 +27,14 @@ fn main() {
     // Prioritize environment variables over feature flags
     if env::var(STATIC_BUILD_ARG).is_ok() || cfg!(feature = "static") {
         println!("cargo:rerun-if-changed=wrapper.h");
+
+        // pull the git submodule
+        // ensure the submodule exists
+        std::process::Command::new("git")
+            .args(["submodule", "update", "--init"])
+            .output()
+            .expect("Failed to pull the git submodule");
+
         compile::lib();
 
         println!(
@@ -55,14 +64,17 @@ fn handle_provided_dll(arch: &str, out_dir: &str, lib_path: &str) {
         if let Some(name) = file.file_name().to_str() {
             match name {
                 "WinDivert.dll" | "WinDivert.lib" | "WinDivert32.sys" | "WinDivert64.sys" => {
-                    let _ = fs::copy(file.path(), format!("{out_dir}/{name}"));
+                    let src = file.path();
+                    let dst = path!({ out_dir } / { name });
+                    let _ = fs::copy(src, dst);
                 }
                 _ => {}
             }
         }
     }
 
-    if fs::metadata(format!("{lib_path}\\WinDivert{arch}.sys")).is_err() {
+    let sys_file = std::path::PathBuf::from(lib_path).join(format!("WinDivert{arch}.sys"));
+    if fs::metadata(&sys_file).is_err() {
         println!("cargo:warning=WinDivert{arch}.sys not found on the same directory as the dll.")
     }
 }