diff --git a/v4l2-sys/build.rs b/v4l2-sys/build.rs
index 8f09e8b..54df410 100644
--- a/v4l2-sys/build.rs
+++ b/v4l2-sys/build.rs
@@ -4,7 +4,10 @@ use std::env;
 use std::path::{Path, PathBuf};
 
 fn main() {
-    let extra_include_paths = if cfg!(target_os = "freebsd") {
+    let extra_include_paths = if std::env::var("CARGO_CFG_TARGET_OS").unwrap() == "freebsd" {
+        // XXX: This path is wrong if the host OS != cross-compilation OS. If anything the host
+        // should simply set up the right path using `BINDGEN_EXTRA_CLANG_ARGS_<triple>`, allowing
+        // us to remove this workaround instead.
         assert!(
             Path::new("/usr/local/include/linux/videodev2.h").exists(),
             "Video4Linux `videodev2.h` UAPI header is required to generate bindings \