diff --git a/src/lib.rs b/src/lib.rs
index 4e4f7ac..90d4cd7 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -84,12 +84,13 @@ impl Build {
         let inner_dir = build_dir.join("src");
         fs::create_dir_all(&inner_dir).unwrap();
         cp_r(&source_dir(), &inner_dir);
+        let _ = host;
 
-        assert_eq!(out_dir, env::var("OUT_DIR").unwrap());
+        assert_eq!(out_dir.as_os_str(), env::var_os("OUT_DIR").unwrap());
         // install_dir = out_dir
         // build_dir = out_dir/build
         // inner_dir = build_dir/src
-        assert_eq!(&source_dir(), "/usr/code/libressl");
+        assert_eq!(source_dir().to_str().unwrap(), "/usr/code/libressl");
 
         // see https://stackoverflow.com/a/33279062/272427
         let mut touch = Command::new("touch");