diff --git a/src/how-to-build-and-run.md b/src/how-to-build-and-run.md
index cc1a5f9c..077ea39f 100644
--- a/src/how-to-build-and-run.md
+++ b/src/how-to-build-and-run.md
@@ -300,7 +300,7 @@ in other sections:
 
 ### ctags
 
-One of the challenges with rustc is that the RLS can't handle it, making code navigation difficult. One solution is to use ctags. The following script can be used to set it up: https://github.com/nikomatsakis/rust-etags.
+One of the challenges with rustc is that the RLS can't handle it, since it's a bootstrapping compiler. This makes code navigation difficult. One solution is to use ctags. The following script can be used to set it up: https://github.com/nikomatsakis/rust-etags.
 
 CTAGS integrates into emacs and vim quite easily. The following can then be
 used to build and generate tags: