diff --git a/collects/scribblings/raco/link.scrbl b/collects/scribblings/raco/link.scrbl
index e369f00af1..9027bbfb72 100644
--- a/collects/scribblings/raco/link.scrbl
+++ b/collects/scribblings/raco/link.scrbl
@@ -58,7 +58,15 @@ Full command-line options:
        @DFlag{remove} flag is also used, only links with a collection
        name matching @nonterm{name} are removed, and if no directory
        arguments are provided, all links with a match to
-       @nonterm{name} are removed.}
+       @nonterm{name} are removed. This flag is mutually exclusive with
+       @Flag{d} and @DFlag{root}.}
+
+ @item{@Flag{d} or @DFlag{root} --- Treats each directory as a
+       collection root that contains collection directories, instead of
+       a directory for a specific collection. When the @Flag{r} or
+       @DFlag{remove} flag is also used, only collection-root links
+       that match a directory are removed. This flag is mutually
+       exclusive with @Flag{n} and @DFlag{name}.}
 
  @item{@Flag{x} @nonterm{regexp} or @DFlag{version-regexp}
        @nonterm{regexp} --- Sets a version regexp that limits the link
@@ -106,6 +114,7 @@ Full command-line options:
                 [#:user? user? #t]
                 [#:file file (or/c path-string? #f) #f]
                 [#:name name (or/c string? #f) #f]
+                [#:root? root? any/c #f]
                 [#:version-regexp version-regexp (or/c regexp? #f) #f]
                 [#:error error-proc (symbol? string? any/c ... . -> . any) error]
                 [#:remove? remove? any/c #f]
@@ -122,8 +131,10 @@ reference-doc]{collection links file} if @racket[user?] is false.
 The @racket[error-proc] argument is called to raise exceptions that
 would be fatal to the @exec{raco link} command.
 
-If @racket[remove?] is false, the result is a list of top-level
-collection names (as strings) that are mapped by @racket[file] and
-that apply to the running version of Racket. If @racket[remove?] is
-true, the result is a list of entries that were removed from the file.}
-
+If @racket[remove?] is true, the result is a list of entries that were
+removed from the file.  If @racket[remove?] is false but
+@racket[root?] is true, the result is a list of paths for collection
+roots. If @racket[remove?] and @racket[root?] are both false, the
+result is a list of top-level collection names (as strings) that are
+mapped by @racket[file] and that apply to the running version of
+Racket.}
diff --git a/collects/scribblings/reference/collects.scrbl b/collects/scribblings/reference/collects.scrbl
index d26e60ca84..80902790a3 100644
--- a/collects/scribblings/reference/collects.scrbl
+++ b/collects/scribblings/reference/collects.scrbl
@@ -185,21 +185,23 @@ the file is re-read if its timestamp changes.
 
 Each @tech{collection links file} is @racket[read] with default reader
 parameter settings to obtain a list. Every element of the list must be
-a link specification with either the form @racket[(_string _path)] or
-the form @racket[(_string _path _regexp)]. In both cases, the
-@racket[_string] names a top-level @tech{collection}, and
-@racket[_path] is a path that can be used as the collection's path
-(directly, as opposed to a subdirectory of @racket[_path] named by
-@racket[_string]). If @racket[_path] is a relative path, it is
-relative to the directory containing the @tech{collection links
-file}. If @racket[_regexp] is specified in a link, then the link is
-used only if @racket[(regexp-match?  _regexp (version))] produces a
-true result.
+a link specification with one of the forms @racket[(list _string
+_path)], @racket[(list _string _path _regexp)], @racket[(list 'root
+_path)], or @racket[(list 'root _regexp)]. A @racket[_string] names a
+top-level @tech{collection}, in which case @racket[_path] is a path
+that can be used as the collection's path (directly, as opposed to a
+subdirectory of @racket[_path] named by @racket[_string]). A
+@racket['root] entry, in contrast, acts like an path in
+@racket[(current-library-collection-paths)]. If @racket[_path] is a
+relative path, it is relative to the directory containing the
+@tech{collection links file}. If @racket[_regexp] is specified in a
+link, then the link is used only if @racket[(regexp-match?  _regexp
+(version))] produces a true result.
 
 A single top-level collection can have multiple links in a
-@tech{collection links file}. The corresponding paths are effectively
-spliced together, since the paths are tried in order to locate a file
-or sub-collection.
+@tech{collection links file}, and any number of @racket['root] entries
+can appear. The corresponding paths are effectively spliced together,
+since the paths are tried in order to locate a file or sub-collection.
 
 The @exec{raco link} command-link tool can display, install, and
 remove links in the @tech{collection links file}. See @secref[#:doc
diff --git a/collects/setup/commands/link.rkt b/collects/setup/commands/link.rkt
index d912cc423b..819c0c3db6 100644
--- a/collects/setup/commands/link.rkt
+++ b/collects/setup/commands/link.rkt
@@ -5,6 +5,7 @@
 
 (define link-file (make-parameter #f))
 (define link-name (make-parameter #f))
+(define root-mode (make-parameter #f))
 (define link-version (make-parameter #f))
 (define remove-mode (make-parameter #f))
 (define repair-mode (make-parameter #f))
@@ -20,8 +21,12 @@
    #:once-each
    [("-l" "--list") "Show the link table (after changes)"
     (show-mode #t)]
+   #:once-any
    [("-n" "--name") name "Collection name to add (single <dir>) or remove"
     (link-name name)]
+   [("-d" "--root") "Treat <dir> as a collection root"
+    (root-mode #t)]
+   #:once-each
    [("-x" "--version-regexp") regexp "Set the version pregexp"
     (with-handlers ([exn:fail:contract? (lambda (exn)
                                           (raise-user-error link-symbol
@@ -62,6 +67,7 @@
 (define (go user?)
   (apply links
          dirs
+         #:root? (root-mode)
          #:user? user?
          #:file (link-file)
          #:name (link-name)
diff --git a/collects/setup/link.rkt b/collects/setup/link.rkt
index a266d0f291..ed11ba56c6 100644
--- a/collects/setup/link.rkt
+++ b/collects/setup/link.rkt
@@ -10,6 +10,7 @@
                #:file [in-file #f]
                #:name [name #f]
                #:version-regexp [version-regexp #f]
+               #:root? [root? #f]
                #:remove? [remove? #f]
                #:show? [show? #f]
                #:repair? [repair? #f]
@@ -56,8 +57,9 @@
                                         (= 3 (length e))))
                                (content-error "entry is a not a 2- or 3-element list: " e))
                            #:when 
-                           (or (string? (car e))
-                               (content-error "entry's first element is not a string: " e))
+                           (or (or (string? (car e))
+                                   (eq? 'root (car e)))
+                               (content-error "entry's first element is not a string or 'root: " e))
                            #:when 
                            (or (path-string? (cadr e))
                                (content-error "entry's second element is not a path string: " e))
@@ -100,24 +102,29 @@
                        (find-relative-path file-dir
                                            (simplify-path 
                                             (path->complete-path d))))]
-              [a-name (and d
-                           (or name
-                               (let-values ([(base name dir?) (split-path dp)])
-                                 (path-element->string name))))]
+              [a-name (if root?
+                          'root
+                          (and d
+                               (or name
+                                   (let-values ([(base name dir?) (split-path dp)])
+                                     (path-element->string name)))))]
               [rx version-regexp]
-              [d (and dp (path->string dp))])
+              [d (and dp (path->string dp))]
+              [sd (and d (simplify d))])
          (unless remove?
-           (unless (directory-exists? dp)
+           (unless (directory-exists? sd)
              (error 'links
                     "no such directory for link: ~a"
-                    dp)))
+                    sd)))
          (if remove?
              (filter (lambda (e) 
                        (or (and d
                                 (not (equal? (simplify (cadr e)) 
-                                             (simplify d))))
+                                             sd)))
                            (and name
                                 (not (equal? (car e) name)))
+                           (and root?
+                                (not (eq? (car e) 'root)))
                            (and version-regexp
                                 (pair? (cddr e))
                                 (not (equal? (caddr e) version-regexp)))))
@@ -159,7 +166,10 @@
 
   (when show?
     (for ([e (in-list new-table)])
-      (printf " collection: ~s  path: ~s~a\n"
+      (printf " ~a~s  path: ~s~a\n"
+              (if (eq? (car e) 'root)
+                  ""
+                  "collection: ")
               (car e)
               (path->string (simplify (cadr e)))
               (if (null? (cddr e))
@@ -170,10 +180,17 @@
   (if remove?
       ;; return list of removed entries:
       (filter (lambda (e) (not (member e new-table))) table)
-      ;; Return list of collections mapped for this version:
-      (let ([ht (make-hash)])
-        (for ([e (in-list new-table)])
-          (when (or (null? (cddr e))
-                    (regexp-match? (caddr e) (version)))
-            (hash-set! ht (car e) #t)))
-        (hash-map ht (lambda (k e) k)))))
+      (if root?
+          ;; Return root paths:
+          (for/list ([e (in-list new-table)]
+                     #:when (eq? 'root (car e)))
+            (simplify (cadr e)))
+          ;; Return list of collections mapped for this version:
+          (let ([ht (make-hash)])
+            (for ([e (in-list new-table)])
+              (when (and (string? (car e))
+                         (or (null? (cddr e))
+                             (regexp-match? (caddr e) (version))))
+                (hash-set! ht (car e) #t)))
+            (hash-map ht (lambda (k e) k))))))
+
diff --git a/collects/setup/setup-unit.rkt b/collects/setup/setup-unit.rkt
index 6cc099bcf6..5c177033c1 100644
--- a/collects/setup/setup-unit.rkt
+++ b/collects/setup/setup-unit.rkt
@@ -283,31 +283,41 @@
 
   (define all-collections
     (let ([ht (make-hash)])
+      (define (maybe collection ->cc)
+        (hash-ref ht collection
+                  (lambda ()
+                    (let ([cc (->cc collection)])
+                      (when cc (hash-set! ht collection cc))))))
       (for ([cp (current-library-collection-paths)]
             #:when (directory-exists? cp)
             [collection (directory-list cp)]
             #:when (directory-exists? (build-path cp collection)))
-        (hash-ref ht collection
-          (lambda ()
-            (let ([cc (collection->cc (list collection))])
-              (when cc (hash-set! ht collection cc))))))
+        (maybe (list collection) collection->cc))
       (let ([main-collects (find-collects-dir)])
+        (define (->cc col)
+          (collection->cc col
+                          #:info-root main-collects
+                          #:info-path-mode 'abs-in-relative
+                          #:omit-root 'dir))
         (for ([c (in-list (links #:user? #f))])
-          (let* ([c (string->path c)]
-                 [cc (collection->cc (list c) 
-                                     #:info-root main-collects
-                                     #:info-path-mode 'abs-in-relative
-                                     #:omit-root 'dir)])
-            (when cc (hash-set! ht c cc)))))
+          (maybe (list (string->path c)) ->cc))
+        (for ([cp (in-list (links #:root? #t #:user? #f))]
+              #:when (directory-exists? cp)
+              [collection (directory-list cp)])
+          (maybe (list collection) ->cc)))
       (when (make-user)
         (let ([user-collects (find-user-collects-dir)])
+          (define (->cc col)
+            (collection->cc col
+                            #:info-root user-collects
+                            #:info-path-mode 'abs-in-relative
+                            #:omit-root 'dir))
           (for ([c (in-list (links))])
-            (let* ([c (string->path c)]
-                   [cc (collection->cc (list c)
-                                       #:info-root user-collects
-                                       #:info-path-mode 'abs-in-relative
-                                       #:omit-root 'dir)])
-              (when cc (hash-set! ht c cc))))))
+            (maybe (list (string->path c)) ->cc))
+          (for ([cp (in-list (links #:root? #t))]
+                #:when (directory-exists? cp)
+                [collection (directory-list cp)])
+            (maybe (list collection) ->cc))))
       (hash-map ht (lambda (k v) v))))
 
   ;; Close over sub-collections
diff --git a/src/racket/src/cstartup.inc b/src/racket/src/cstartup.inc
index 7650cfec55..5098cb9bd3 100644
--- a/src/racket/src/cstartup.inc
+++ b/src/racket/src/cstartup.inc
@@ -15,12 +15,12 @@
 116,120,61,115,70,108,101,116,45,118,97,108,117,101,115,61,120,73,108,101,116,
 114,101,99,45,118,97,108,117,101,115,66,108,97,109,98,100,97,1,20,112,97,
 114,97,109,101,116,101,114,105,122,97,116,105,111,110,45,107,101,121,61,118,73,
-100,101,102,105,110,101,45,118,97,108,117,101,115,97,36,11,8,240,112,76,0,
+100,101,102,105,110,101,45,118,97,108,117,101,115,97,36,11,8,240,122,76,0,
 0,95,159,2,17,36,36,159,2,16,36,36,159,2,16,36,36,16,20,2,4,
 2,2,2,6,2,2,2,8,2,2,2,7,2,2,2,9,2,2,2,10,2,
 2,2,11,2,2,2,5,2,2,2,12,2,2,2,13,2,2,97,37,11,8,
-240,112,76,0,0,93,159,2,16,36,37,16,2,2,3,161,2,2,37,2,3,
-2,2,2,3,96,11,11,8,240,112,76,0,0,16,0,96,38,11,8,240,112,
+240,122,76,0,0,93,159,2,16,36,37,16,2,2,3,161,2,2,37,2,3,
+2,2,2,3,96,11,11,8,240,122,76,0,0,16,0,96,38,11,8,240,122,
 76,0,0,16,0,18,98,64,104,101,114,101,13,16,5,36,2,14,2,2,11,
 11,8,32,8,31,8,30,8,29,27,248,22,155,4,195,249,22,148,4,80,158,
 39,36,251,22,83,2,18,248,22,98,199,12,249,22,73,2,19,248,22,100,201,
@@ -30,14 +30,14 @@
 74,193,249,22,148,4,80,158,39,36,251,22,83,2,18,248,22,74,199,249,22,
 73,2,11,248,22,75,201,11,18,100,10,13,16,5,36,2,14,2,2,11,11,
 8,32,8,31,8,30,8,29,16,4,11,11,2,20,3,1,8,101,110,118,49,
-52,55,57,57,16,4,11,11,2,21,3,1,8,101,110,118,49,52,56,48,48,
+52,56,48,57,16,4,11,11,2,21,3,1,8,101,110,118,49,52,56,49,48,
 27,248,22,75,248,22,155,4,196,28,248,22,81,193,20,14,159,37,36,37,28,
 248,22,81,248,22,75,194,248,22,74,193,249,22,148,4,80,158,39,36,250,22,
 83,2,22,248,22,83,249,22,83,248,22,83,2,23,248,22,74,201,251,22,83,
 2,18,2,23,2,23,249,22,73,2,13,248,22,75,204,18,100,11,13,16,5,
 36,2,14,2,2,11,11,8,32,8,31,8,30,8,29,16,4,11,11,2,20,
-3,1,8,101,110,118,49,52,56,48,50,16,4,11,11,2,21,3,1,8,101,
-110,118,49,52,56,48,51,248,22,155,4,193,27,248,22,155,4,194,249,22,73,
+3,1,8,101,110,118,49,52,56,49,50,16,4,11,11,2,21,3,1,8,101,
+110,118,49,52,56,49,51,248,22,155,4,193,27,248,22,155,4,194,249,22,73,
 248,22,83,248,22,74,196,248,22,75,195,27,248,22,75,248,22,155,4,23,197,
 1,249,22,148,4,80,158,39,36,28,248,22,58,248,22,149,4,248,22,74,23,
 198,2,27,249,22,2,32,0,88,163,8,36,37,43,11,9,222,33,40,248,22,
@@ -67,8 +67,8 @@
 140,9,248,22,149,4,248,22,74,200,64,101,108,115,101,10,248,22,74,197,250,
 22,84,2,22,9,248,22,75,200,249,22,73,2,5,248,22,75,202,99,13,16,
 5,36,2,14,2,2,11,11,8,32,8,31,8,30,8,29,16,4,11,11,2,
-20,3,1,8,101,110,118,49,52,56,50,53,16,4,11,11,2,21,3,1,8,
-101,110,118,49,52,56,50,54,18,158,94,10,64,118,111,105,100,8,48,27,248,
+20,3,1,8,101,110,118,49,52,56,51,53,16,4,11,11,2,21,3,1,8,
+101,110,118,49,52,56,51,54,18,158,94,10,64,118,111,105,100,8,48,27,248,
 22,75,248,22,155,4,196,249,22,148,4,80,158,39,36,28,248,22,58,248,22,
 149,4,248,22,74,197,250,22,83,2,28,248,22,83,248,22,74,199,248,22,98,
 198,27,248,22,149,4,248,22,74,197,250,22,83,2,28,248,22,83,248,22,74,
@@ -99,492 +99,502 @@
   }
   {
     SHARED_OK static MZCOMPILED_STRING_FAR unsigned char expr[] = {35,126,7,53,46,49,46,51,46,53,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,107,0,0,0,1,0,0,8,0,21,0,26,
+0,0,0,0,0,0,0,0,0,109,0,0,0,1,0,0,8,0,21,0,26,
 0,43,0,65,0,94,0,109,0,127,0,143,0,157,0,179,0,195,0,212,0,
 234,0,245,0,251,0,4,1,11,1,18,1,30,1,46,1,70,1,102,1,120,
 1,140,1,156,1,174,1,205,1,219,1,224,1,234,1,242,1,251,1,253,1,
-255,1,27,2,59,2,72,2,78,2,117,2,121,2,166,2,190,2,229,2,243,
-2,246,2,249,2,3,3,14,3,181,3,25,5,143,5,5,6,46,6,119,7,
-142,7,159,7,107,9,210,9,224,9,128,10,57,12,66,12,75,12,89,12,99,
-12,140,13,242,13,72,14,158,14,2,15,86,15,100,15,214,15,42,16,56,16,
-9,17,17,17,123,17,172,17,174,17,18,18,78,18,83,18,189,18,10,19,168,
-20,190,20,199,20,192,21,210,21,224,21,183,22,202,22,140,25,4,30,110,30,
-255,30,240,31,222,32,229,32,54,33,137,33,222,33,248,33,121,34,0,0,221,
-38,0,0,67,35,37,117,116,105,108,115,72,112,97,116,104,45,115,116,114,105,
-110,103,63,64,98,115,98,115,76,110,111,114,109,97,108,45,99,97,115,101,45,
-112,97,116,104,1,20,102,105,110,100,45,101,120,101,99,117,116,97,98,108,101,
-45,112,97,116,104,1,27,112,97,116,104,45,108,105,115,116,45,115,116,114,105,
-110,103,45,62,112,97,116,104,45,108,105,115,116,74,45,99,104,101,99,107,45,
-114,101,108,112,97,116,104,77,45,99,104,101,99,107,45,99,111,108,108,101,99,
-116,105,111,110,75,99,111,108,108,101,99,116,105,111,110,45,112,97,116,104,73,
-102,105,110,100,45,99,111,108,45,102,105,108,101,1,20,99,111,108,108,101,99,
-116,105,111,110,45,102,105,108,101,45,112,97,116,104,75,117,115,101,114,45,108,
-105,110,107,115,45,112,97,116,104,76,117,115,101,114,45,108,105,110,107,115,45,
-99,97,99,104,101,1,20,117,115,101,114,45,108,105,110,107,115,45,116,105,109,
-101,115,116,97,109,112,70,108,105,110,107,115,45,112,97,116,104,65,113,117,111,
-116,101,68,35,37,112,97,114,97,109,122,29,94,2,16,2,17,11,29,94,2,
-16,2,17,11,71,108,105,110,107,115,45,99,97,99,104,101,75,108,105,110,107,
-115,45,116,105,109,101,115,116,97,109,112,1,22,103,101,116,45,108,105,110,107,
-101,100,45,99,111,108,108,101,99,116,105,111,110,115,1,30,110,111,114,109,97,
-108,105,122,101,45,99,111,108,108,101,99,116,105,111,110,45,114,101,102,101,114,
-101,110,99,101,77,99,104,101,99,107,45,115,117,102,102,105,120,45,99,97,108,
-108,79,112,97,116,104,45,114,101,112,108,97,99,101,45,115,117,102,102,105,120,
-75,112,97,116,104,45,97,100,100,45,115,117,102,102,105,120,77,108,111,97,100,
-47,117,115,101,45,99,111,109,112,105,108,101,100,1,29,102,105,110,100,45,108,
-105,98,114,97,114,121,45,99,111,108,108,101,99,116,105,111,110,45,112,97,116,
-104,115,73,101,109,98,101,100,100,101,100,45,108,111,97,100,64,108,111,111,112,
-69,101,120,101,99,45,102,105,108,101,67,119,105,110,100,111,119,115,68,114,101,
-108,97,116,105,118,101,5,0,5,0,6,25,25,112,97,116,104,32,111,114,32,
-118,97,108,105,100,45,112,97,116,104,32,115,116,114,105,110,103,6,29,29,126,
-97,58,32,105,110,118,97,108,105,100,32,114,101,108,97,116,105,118,101,32,112,
-97,116,104,58,32,126,115,72,99,111,108,108,101,99,116,115,45,100,105,114,65,
-101,114,114,111,114,6,36,36,101,114,114,111,114,32,114,101,97,100,105,110,103,
-32,108,105,110,107,101,100,32,99,111,108,108,101,99,116,105,111,110,115,58,32,
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-    EVAL_ONE_SIZED_STR((char *)expr, 10204);
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+80,159,36,36,37,20,15,16,2,249,22,132,7,7,92,7,92,80,159,36,37,
+37,20,15,16,2,88,163,36,37,54,38,2,4,223,0,33,55,80,159,36,38,
+37,20,15,16,2,20,25,96,2,5,88,163,8,36,39,8,24,52,9,223,0,
+33,62,88,163,36,38,47,44,9,223,0,33,63,88,163,36,37,46,44,9,223,
+0,33,64,80,159,36,39,37,20,15,16,2,27,248,22,131,15,248,22,144,8,
+27,28,249,22,140,9,247,22,152,8,2,32,6,1,1,59,6,1,1,58,250,
+22,178,7,6,14,14,40,91,94,126,97,93,42,41,126,97,40,46,42,41,23,
+196,2,23,196,1,88,163,8,36,38,48,11,2,6,223,0,33,68,80,159,36,
+40,37,20,15,16,2,32,0,88,163,8,36,38,50,11,2,7,222,33,69,80,
+159,36,41,37,20,15,16,2,32,0,88,163,8,36,39,51,11,2,8,222,33,
+71,80,159,36,42,37,20,15,16,2,88,163,45,38,51,8,128,4,2,9,223,
+0,33,74,80,159,36,43,37,20,15,16,2,88,163,45,39,52,8,128,4,2,
+11,223,0,33,77,80,159,36,45,37,20,15,16,2,248,22,188,14,70,108,105,
+110,107,115,45,102,105,108,101,80,159,36,46,37,20,15,16,2,247,22,133,2,
+80,158,36,47,20,15,16,2,2,78,80,158,36,48,20,15,16,2,248,80,159,
+37,50,37,88,163,36,36,49,8,240,8,128,1,0,9,223,1,33,79,80,159,
+36,49,37,20,15,16,2,247,22,133,2,80,158,36,53,20,15,16,2,2,78,
+80,158,36,54,20,15,16,2,88,163,36,37,44,8,240,0,188,23,0,2,22,
+223,0,33,90,80,159,36,55,37,20,15,16,2,88,163,36,38,56,8,240,0,
+0,32,0,2,23,223,0,33,92,80,159,36,57,37,20,15,16,2,88,163,36,
+41,59,8,240,0,32,40,0,2,10,223,0,33,99,80,159,36,44,37,20,15,
+16,2,32,0,88,163,36,39,50,11,2,24,222,33,100,80,159,36,58,37,20,
+15,16,2,32,0,88,163,36,38,53,11,2,25,222,33,101,80,159,36,59,37,
+20,15,16,2,32,0,88,163,36,38,54,11,2,26,222,33,102,80,159,36,8,
+24,37,20,15,16,2,32,0,88,163,36,37,44,11,2,27,222,33,103,80,159,
+36,8,25,37,20,15,16,2,20,25,96,2,28,88,163,36,36,53,16,2,52,
+8,128,64,9,223,0,33,104,88,163,36,37,54,16,2,52,8,128,128,9,223,
+0,33,105,88,163,36,38,55,16,2,52,8,240,0,64,0,0,9,223,0,33,
+106,80,159,36,8,26,37,20,15,16,2,88,163,8,36,39,54,16,2,44,8,
+240,0,128,0,0,2,29,223,0,33,108,80,159,36,8,27,37,95,29,94,2,
+16,68,35,37,107,101,114,110,101,108,11,29,94,2,16,69,35,37,109,105,110,
+45,115,116,120,11,2,18,9,9,9,36,0};
+    EVAL_ONE_SIZED_STR((char *)expr, 10406);
   }
   {
     SHARED_OK static MZCOMPILED_STRING_FAR unsigned char expr[] = {35,126,7,53,46,49,46,51,46,53,0,0,0,0,0,0,0,0,0,0,0,
@@ -923,7 +933,7 @@
 107,11,29,94,2,2,68,35,37,112,97,114,97,109,122,11,29,94,2,2,74,
 35,37,112,108,97,99,101,45,115,116,114,117,99,116,11,29,94,2,2,66,35,
 37,98,111,111,116,11,29,94,2,2,68,35,37,101,120,112,111,98,115,11,29,
-94,2,2,68,35,37,107,101,114,110,101,108,11,97,36,11,8,240,28,78,0,
+94,2,2,68,35,37,107,101,114,110,101,108,11,97,36,11,8,240,48,78,0,
 0,100,159,2,3,36,36,159,2,4,36,36,159,2,5,36,36,159,2,6,36,
 36,159,2,7,36,36,159,2,8,36,36,159,2,9,36,36,159,2,9,36,36,
 16,0,159,36,20,112,159,36,16,1,11,16,0,20,26,142,2,1,2,1,29,
diff --git a/src/racket/src/startup.inc b/src/racket/src/startup.inc
index ef9b325a41..da5de8b0c3 100644
--- a/src/racket/src/startup.inc
+++ b/src/racket/src/startup.inc
@@ -311,7 +311,8 @@
 "(when(log-level? l 'error)"
 "(log-message l 'error "
 "(format"
-" \"error reading linked collections: ~a\""
+" \"error reading collection links file ~s: ~a\""
+"(if user? user-links-path links-path)"
 "(exn-message exn))"
 "(current-continuation-marks))))"
 "(when ts"
@@ -364,7 +365,8 @@
 "(and(list? p)"
 "(or(= 2(length p))"
 "(= 3(length p)))"
-"(string?(car p))"
+"(or(string?(car p))"
+"(eq? 'root(car p)))"
 "(path-string?(cadr p))"
 "(or(null?(cddr p))"
 "(regexp?(caddr p)))))"
@@ -379,10 +381,23 @@
 "(lambda(p)"
 "(when(or(null?(cddr p))"
 "(regexp-match?(caddr p)(version)))"
+"(let((dir(simplify-path"
+"(path->complete-path(cadr p) dir))))"
+"(if(symbol?(car p))"
+"(begin"
+"(unless(hash-ref ht #f #f)"
+"(hash-set! ht #f null))"
+"(hash-for-each"
+" ht"
+"(lambda(k v)"
+"(hash-set! ht k(cons dir v)))))"
 "(let((s(string->symbol(car p))))"
-"(hash-set! ht s(cons(box(path->complete-path(cadr p) dir))"
-"(hash-ref ht s null))))))"
+"(hash-set! ht s(cons(box dir)"
+"(hash-ref ht s null))))))))"
 " v)"
+"(hash-for-each"
+" ht"
+"(lambda(k v)(hash-set! ht k(reverse v))))"
 "(if user?"
 "(begin"
 "(set! user-links-cache ht)"
@@ -422,10 +437,14 @@
 " collection))))"
 "(append"
 "(if(use-user-specific-search-paths)"
-"(hash-ref(get-linked-collections #t) sym null)"
+"(let((ht(get-linked-collections #t)))"
+"(or(hash-ref ht sym #f)"
+"(hash-ref ht #f null)))"
 " null)"
 "(if links-path"
-"(hash-ref(get-linked-collections #f) sym null)"
+"(let((ht(get-linked-collections #f)))"
+"(or(hash-ref ht sym #f)"
+"(hash-ref ht #f null)))"
 " null)"
 "(current-library-collection-paths)))))"
 "(define-values(*build-path-rep)"
diff --git a/src/racket/src/startup.rktl b/src/racket/src/startup.rktl
index 60796ff4b3..71de2fdd70 100644
--- a/src/racket/src/startup.rktl
+++ b/src/racket/src/startup.rktl
@@ -379,7 +379,8 @@
                          (when (log-level? l 'error)
                            (log-message l 'error 
                                         (format
-                                         "error reading linked collections: ~a"
+                                         "error reading collection links file ~s: ~a"
+                                         (if user? user-links-path links-path)
                                          (exn-message exn))
                                         (current-continuation-marks))))
                        (when ts
@@ -432,7 +433,8 @@
                                                       (and (list? p)
                                                            (or (= 2 (length p))
                                                                (= 3 (length p)))
-                                                           (string? (car p))
+                                                           (or (string? (car p))
+                                                               (eq? 'root (car p)))
                                                            (path-string? (cadr p))
                                                            (or (null? (cddr p))
                                                                (regexp? (caddr p)))))
@@ -447,10 +449,29 @@
                                   (lambda (p)
                                     (when (or (null? (cddr p))
                                               (regexp-match? (caddr p) (version)))
-                                      (let ([s (string->symbol (car p))])
-                                        (hash-set! ht s (cons (box (path->complete-path (cadr p) dir))
-                                                              (hash-ref ht s null))))))
+                                      (let ([dir (simplify-path
+                                                  (path->complete-path (cadr p) dir))])
+                                        (if (symbol? (car p))
+                                            ;; add to every table element (to keep
+                                            ;; the choices in order); need a better
+                                            ;; data structure
+                                            (begin
+                                              (unless (hash-ref ht #f #f)
+                                                (hash-set! ht #f null))
+                                              (hash-for-each
+                                               ht
+                                               (lambda (k v)
+                                                 (hash-set! ht k (cons dir v)))))
+                                            ;; single collection:
+                                            (let ([s (string->symbol (car p))])
+                                              (hash-set! ht s (cons (box dir)
+                                                                    (hash-ref ht s null))))))))
                                   v)
+                                 ;; reverse all lists:
+                                 (hash-for-each
+                                  ht
+                                  (lambda (k v) (hash-set! ht k (reverse v))))
+                                 ;; save table & timestamp:
                                  (if user?
                                      (begin
                                        (set! user-links-cache ht)
@@ -492,13 +513,17 @@
                                                         (path->string collection)
                                                         collection))])
                            (append
-                            ;; list of (box path)s:
+                            ;; list of paths and (box path)s:
                             (if (use-user-specific-search-paths)
-                                (hash-ref (get-linked-collections #t) sym null)
+                                (let ([ht (get-linked-collections #t)])
+                                  (or (hash-ref ht sym #f)
+                                      (hash-ref ht #f null)))
                                 null)
-                            ;; list of (box path)s:
+                            ;; list of paths and (box path)s:
                             (if links-path
-                                (hash-ref (get-linked-collections #f) sym null)
+                                (let ([ht (get-linked-collections #f)])
+                                  (or (hash-ref ht sym #f)
+                                      (hash-ref ht #f null)))
                                 null)
                             ;; list of paths:
                             (current-library-collection-paths)))])