diff --git a/build.rs b/build.rs
index e4fc919..baf03e8 100644
--- a/build.rs
+++ b/build.rs
@@ -5,7 +5,7 @@ use std::path::Path;
 
 fn main() {
     let linux_headers_path = {
-        let path = env::var("LINUX_HEADERS_PATH").unwrap();
+        let path = env::var("LINUX_HEADERS_PATH").expect("LINUX_HEADERS_PATH not present");
         let path = Path::new(&path).canonicalize().unwrap();
         path.to_str().unwrap().to_string()
     };