diff --git a/modules/module/settings/lang-packages.nix b/modules/module/settings/lang-packages.nix
index 97ec4e7..3be7a9a 100644
--- a/modules/module/settings/lang-packages.nix
+++ b/modules/module/settings/lang-packages.nix
@@ -44,7 +44,10 @@
         data_table
         janitor
         styler
-        vscDebugger
+        # vscDebugger is not on CRAN/Bioconductor, so it is not available in
+        # pkgs.rpkgs.rPackages. Install it manually in your R library if you
+        # want to use the nvim-dap R adapter (see plugin/26_dap.lua).
+        # vscDebugger
         lintr
       ])
     );
diff --git a/modules/module/specs/plugins.nix b/modules/module/specs/plugins.nix
index d003fbe..7630632 100644
--- a/modules/module/specs/plugins.nix
+++ b/modules/module/specs/plugins.nix
@@ -191,7 +191,7 @@ in {
 
   # Lazy-loaded plugins needed when the `r` cat is on. Kept separate from
   # `utils-lazy` so users with `r=true` and `utils=false` still get the
-  # R debugger (via vscDebugger) and in-buffer image rendering for plots.
+  # nvim-dap R adapter and in-buffer image rendering for plots.
   config.specs.r-lazy = lib.mkIf (config.cats.r or false) {
     lazy = true;
     data = with pkgs.vimPlugins; [