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-rw-r--r--system/rust/build.rs4
1 files changed, 4 insertions, 0 deletions
diff --git a/system/rust/build.rs b/system/rust/build.rs
index af1895276d..c4ccf5c05e 100644
--- a/system/rust/build.rs
+++ b/system/rust/build.rs
@@ -1,3 +1,7 @@
+//! Build file to generate packets
+//!
+//! Run `cargo install .` in `tools/pdl` to ensure `pdl` is in your
+//! path.
use std::{
env,
fs::File,