--- a/rust/hg-core/src/lib.rs	Thu Mar 19 14:54:10 2020 -0400
+++ b/rust/hg-core/src/lib.rs	Fri Mar 20 17:18:14 2020 +0900
@@ -27,6 +27,14 @@
 pub mod re2;
 pub mod utils;
 
+// Remove this to see (potential) non-artificial compile failures. MacOS
+// *should* compile, but fail to compile tests for example as of 2020-03-06
+#[cfg(not(target_os = "linux"))]
+compile_error!(
+    "`hg-core` has only been tested on Linux and will most \
+     likely not behave correctly on other platforms."
+);
+
 use crate::utils::hg_path::{HgPathBuf, HgPathError};
 pub use filepatterns::{
     parse_pattern_syntax, read_pattern_file, IgnorePattern,