diff --git a/{{project-name}}-ebpf/rust-toolchain.toml b/{{project-name}}-ebpf/rust-toolchain.toml
index e5df491..4893202 100644
--- a/{{project-name}}-ebpf/rust-toolchain.toml
+++ b/{{project-name}}-ebpf/rust-toolchain.toml
@@ -1,3 +1,5 @@
 [toolchain]
 channel="nightly-2023-01-10"
+# The source code of rustc, provided by the rust-src component, is needed for
+# building eBPF programs.
 components = [ "rustc", "rust-std", "cargo", "rust-docs", "rustfmt", "clippy", "rust-src" ]