diff --git a/rust/Cargo.toml b/rust/Cargo.toml
index fd36e59..d0ad61f 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -35,4 +35,6 @@ path = "src/lib.rs"
 name = "glome"
 path = "src/cli/bin.rs"
 
+# The binary has more dependencies than the library. We allow skipping the binary and its
+# dependencies by hiding it behind a feature.
 required-features = ["cli"]