diff --git a/pkgs/scribble-pkgs/scribble-lib/info.rkt b/pkgs/scribble-pkgs/scribble-lib/info.rkt
index 45be4bdd..27de3c8d 100644
--- a/pkgs/scribble-pkgs/scribble-lib/info.rkt
+++ b/pkgs/scribble-pkgs/scribble-lib/info.rkt
@@ -6,13 +6,13 @@
                "base"
                "compatibility-lib"
                "scribble-text-lib"
-               "planet-lib"
+               "planet-lib" ; used dynamically
 	       "net-lib"
                "at-exp-lib"
                "draw-lib" 
                "syntax-color-lib"
-               "sandbox-lib"
-               "rackunit-lib"))
+               "sandbox-lib"))
+(define build-deps '("rackunit-lib"))
 
 (define pkg-desc "implementation (no documentation) part of \"scribble\"")