diff --git a/pkgs/racket-doc/pkg/scribblings/git-workflow.scrbl b/pkgs/racket-doc/pkg/scribblings/git-workflow.scrbl
index a4e8de0e68..b7c93b92f6 100644
--- a/pkgs/racket-doc/pkg/scribblings/git-workflow.scrbl
+++ b/pkgs/racket-doc/pkg/scribblings/git-workflow.scrbl
@@ -134,10 +134,14 @@ ways:
 
  @item{When pulling changes to repositories that have local copies,
        @command-ref{update} pulls changes with the equivalent of @exec{git
-       pull --ff-only}.}
+       pull --ff-only} by default. Supplying @exec{@DFlag{pull} rebase}
+       pulls changes with the equivalent of @exec{git pull --rebase}, instead.
+       Supplying @exec{@DFlag{pull} try} attempts to pull with @exec{git
+       pull --ff-only}, but failure is ignored.}
 
  @item{When @command-ref{update} is given a specific commit as the target
        of the update, it uses the equivalent of @exec{git merge --ff-only
+       @nonterm{checksum}} or @exec{git merge --rebase
        @nonterm{checksum}}. This approach is intended to preserve any
        changes to the package made locally, but it implies that the
        package cannot be ``downgraded'' to a older commit simply by
diff --git a/pkgs/racket-doc/pkg/scribblings/lib.scrbl b/pkgs/racket-doc/pkg/scribblings/lib.scrbl
index 080624fb67..458307ff5a 100644
--- a/pkgs/racket-doc/pkg/scribblings/lib.scrbl
+++ b/pkgs/racket-doc/pkg/scribblings/lib.scrbl
@@ -252,6 +252,7 @@ is true, error messages may suggest specific command-line flags for
                            [#:strip strip (or/c #f 'source 'binary 'binary-lib) #f]
                            [#:force-strip? force-string? boolean? #f]
                            [#:multi-clone-mode multi-clone-mode (or/c 'fail 'force 'convert 'ask) 'fail]
+                           [#:pull-mode pull-mode (or/c 'ff-only 'try 'rebase) 'ff-only]
                            [#:link-dirs? link-dirs? boolean? #f])
          (or/c 'skip
                #f
@@ -285,7 +286,8 @@ The package lock must be held; see @racket[with-pkg-lock].
 
 @history[#:changed "6.1.1.5" @elem{Added the @racket[#:multi-clone-mode] 
                                    and @racket[#:infer-clone-from-dir?] arguments.}
-         #:changed "6.1.1.6" @elem{Added the @racket[#:use-trash?] argument.}]}
+         #:changed "6.1.1.6" @elem{Added the @racket[#:use-trash?] argument.}
+         #:changed "6.1.1.8" @elem{Added the @racket[#:pull-mode] argument.}]}
 
 
 @defproc[(pkg-update      [sources (listof (or/c string? pkg-desc?))]
@@ -305,6 +307,7 @@ The package lock must be held; see @racket[with-pkg-lock].
                           [#:force-strip? force-string? boolean? #f]
                           [#:lookup-for-clone? lookup-for-clone? boolean? #f]
                           [#:multi-clone-mode multi-clone-mode (or/c 'fail 'force 'convert 'ask) 'fail]
+                          [#:pull-mode pull-mode (or/c 'ff-only 'try 'rebase) 'ff-only]
                           [#:link-dirs? link-dirs? boolean? #f]
                           [#:infer-clone-from-dir? infer-clone-from-dir? boolean? #f])
         (or/c 'skip
@@ -340,7 +343,8 @@ The package lock must be held; see @racket[with-pkg-lock].
 
 @history[#:changed "6.1.1.5" @elem{Added the @racket[#:multi-clone-mode] 
                                    and @racket[#:infer-clone-from-dir?] arguments.}
-         #:changed "6.1.1.6" @elem{Added the @racket[#:use-trash?] argument.}]}
+         #:changed "6.1.1.6" @elem{Added the @racket[#:use-trash?] argument.}
+         #:changed "6.1.1.8" @elem{Added the @racket[#:pull-mode] argument.}]}
 
 
 @defproc[(pkg-remove      [names (listof string?)]
diff --git a/pkgs/racket-doc/pkg/scribblings/pkg.scrbl b/pkgs/racket-doc/pkg/scribblings/pkg.scrbl
index b954e648ee..d3c8fd8bcd 100644
--- a/pkgs/racket-doc/pkg/scribblings/pkg.scrbl
+++ b/pkgs/racket-doc/pkg/scribblings/pkg.scrbl
@@ -571,6 +571,22 @@ sub-commands.
 
     ]}
 
+  @item{@DFlag{pull} @nonterm{mode} --- Specifies the way that commits
+   are merged to clone-linked packages (see @secref["git-workflow"])
+   on installation or update. The following modes are available:
+
+   @itemlist[
+
+      @item{@exec{ff-only} --- Commits are merged using @DFlag{ff-only}, and installation fails
+                               if the fast-forward merge fails.}
+
+      @item{@exec{try} --- Like @exec{ff-only}, but if the fast-forward fails, the repository checkout is
+                           left as-is, and installation continues.}
+
+      @item{@exec{rebase} --- Commits are merged using @exec{git rebase} instead of @exec{git merge}.}
+
+    ]}
+
 
   @item{@DFlag{no-setup} --- Does not run @exec{raco setup} after installation. This behavior is also the case if the
         environment variable @envvar{PLT_PKG_NOSETUP} is set to any non-empty value.}
@@ -588,7 +604,8 @@ sub-commands.
 @history[#:changed "6.1.1.5" @elem{Added the @DFlag{batch}, @DFlag{clone}, and
                                    @DFlag{multi-clone} flags.}
          #:changed "6.1.1.6" @elem{Added the @DFlag{no-trash} flag, and changed
-                                   the @DFlag{deps} default to depend only on interactive mode.}]}
+                                   the @DFlag{deps} default to depend only on interactive mode.}
+         #:changed "6.1.1.8" @elem{Added the @DFlag{pull} flag.}]}
 
 
 @subcommand{@command/toc{update} @nonterm{option} ... @nonterm{pkg-source} ... 
@@ -695,6 +712,8 @@ the given @nonterm{pkg-source}s.
        clone to non-clone linking---but only for sharing differences implied by the immediate
        command-line arguments compared against existing package installations.}
 
+ @item{@DFlag{pull} @nonterm{mode} --- Same as for @command-ref{install}}
+
  @item{@DFlag{no-setup} --- Same as for @command-ref{install}.}
  @item{@DFlag{jobs} @nonterm{n} or @Flag{j} @nonterm{n} --- Same as for @command-ref{install}.}
  @item{@DFlag{batch} --- Same as for @command-ref{install}.}
@@ -706,7 +725,8 @@ the given @nonterm{pkg-source}s.
                                    added update of enclosing package
                                    when no arguments are provided.}
          #:changed "6.1.1.6" @elem{Added the @DFlag{no-trash} flag, and changed
-                                   the @DFlag{deps} default to depend only on interactive mode.}]}
+                                   the @DFlag{deps} default to depend only on interactive mode.}
+         #:changed "6.1.1.8" @elem{Added the @DFlag{pull} flag.}]}
 
 @subcommand{@command/toc{remove} @nonterm{option} ... @nonterm{pkg} ... 
 --- Attempts to remove the given packages. By default, if a package is the dependency
diff --git a/pkgs/racket-test/tests/pkg/tests-clone.rkt b/pkgs/racket-test/tests/pkg/tests-clone.rkt
index 79c86927c8..cfc4fb382c 100644
--- a/pkgs/racket-test/tests/pkg/tests-clone.rkt
+++ b/pkgs/racket-test/tests/pkg/tests-clone.rkt
@@ -90,6 +90,26 @@
         $ (~a "raco pkg update a") =exit> 1
         $ "racket -l a" =stdout> "3.5\n")
        
+       (shelly-case
+        "failed update can be ignored with `--pull try'"
+        (set-file (build-path clone-dir "a" "main.rkt") "#lang racket/base 3.5")
+        $ (~a "raco pkg update --pull try a") =exit> 0 =stdout> #rx"anyway"
+        $ "racket -l a" =stdout> "3.5\n")
+       
+       (shelly-case
+        "rebase mode fails on conflicts"
+        $ (~a "raco pkg update --pull rebase a") =exit> 1
+        $ "racket -l a" =stdout> "3.5\n")
+       
+       (shelly-case
+        "rebase succeeds on non-conflifting changes"
+        (set-file (build-path clone-dir "a" "main.rkt") "#lang racket/base 3") ; reverts local change
+        (set-file (build-path clone-dir "a" "more.rkt") "#lang racket/base 30")
+        $ (~a "cd " (build-path clone-dir "a") "; git add .; git commit -m change")
+        $ (~a "raco pkg update --pull rebase a")
+        $ "racket -l a" =stdout> "4\n"
+        $ "racket -l a/more" =stdout> "30\n")
+       
        (shelly-case
         "removal of --clone installation leaves local clone intact"
         $ "raco pkg remove a"
diff --git a/racket/collects/pkg/lib.rkt b/racket/collects/pkg/lib.rkt
index 708f902dcb..3228ac94da 100644
--- a/racket/collects/pkg/lib.rkt
+++ b/racket/collects/pkg/lib.rkt
@@ -115,7 +115,8 @@
                         #:link-dirs? boolean?
                         #:infer-clone-from-dir? boolean?
                         #:lookup-for-clone? boolean?
-                        #:multi-clone-behavior (or/c 'fail 'force 'convert 'ask))
+                        #:multi-clone-behavior (or/c 'fail 'force 'convert 'ask)
+                        #:pull-behavior (or/c 'ff-only 'rebase 'try))
         (or/c #f 'skip (listof (or/c path-string? (non-empty-listof path-string?)))))]
   [pkg-remove
    (->* ((listof string?))
@@ -151,7 +152,8 @@
                         #:strip (or/c #f 'source 'binary 'binary-lib)
                         #:force-strip? boolean?
                         #:link-dirs? boolean?
-                        #:multi-clone-behavior (or/c 'fail 'force 'convert 'ask))
+                        #:multi-clone-behavior (or/c 'fail 'force 'convert 'ask)
+                        #:pull-behavior (or/c 'ff-only 'rebase 'try))
         (or/c #f 'skip (listof (or/c path-string? (non-empty-listof path-string?)))))]
   [pkg-migrate
    (->* (string?)
diff --git a/racket/collects/pkg/main.rkt b/racket/collects/pkg/main.rkt
index 8f2cca2241..6fe7ceaebd 100644
--- a/racket/collects/pkg/main.rkt
+++ b/racket/collects/pkg/main.rkt
@@ -261,6 +261,7 @@
                                                                   (if batch
                                                                       'fail
                                                                       'ask))
+                                       #:pull-behavior pull
                                        #:link-dirs? link-dirs?
                                        #:use-trash? (not no-trash)
                                        (for/list ([p (in-list sources)])
@@ -360,6 +361,7 @@
                                                                  (if batch
                                                                      'fail
                                                                      'ask))
+                                      #:pull-behavior pull
                                       #:link-dirs? link-dirs?
                                       #:infer-clone-from-dir? (not (or link static-link copy))
                                       #:use-trash? (not no-trash)))))
@@ -684,7 +686,10 @@
    #:install-clone-flags
    ([(#:sym mode [fail force convert ask] #f) multi-clone ()
      ("Specify treatment of multiple clones of a repository;"
-      "<mode>s: convert, ask (interactive default), fail (other default), or force")])
+      "<mode>s: convert, ask (interactive default), fail (other default), or force")]
+    [(#:sym mode [ff-only try rebase] 'ff-only) pull ()
+     ("Specify `git pull' mode for repository clonse;"
+      "<mode>s: ff-only (the default), try, or rebase")])
    #:update-deps-flags
    ([#:bool update-deps () "For `search-ask' or `search-auto', also update dependencies"]
     [#:bool ignore-implies () "When updating, treat `implies' like other dependencies"])
diff --git a/racket/collects/pkg/private/install.rkt b/racket/collects/pkg/private/install.rkt
index 7484ee3e55..6a3d2588a4 100644
--- a/racket/collects/pkg/private/install.rkt
+++ b/racket/collects/pkg/private/install.rkt
@@ -37,13 +37,15 @@
          pkg-update)
 
 (define (checksum-for-pkg-source pkg-source type pkg-name given-checksum download-printf
-                                 #:catalog-lookup-cache [catalog-lookup-cache #f])
+                                 #:catalog-lookup-cache [catalog-lookup-cache #f]
+                                 #:remote-checksum-cache [remote-checksum-cache #f])
   (case type
     [(file-url dir-url github git clone)
      (or given-checksum
-	 (remote-package-checksum `(url ,pkg-source) download-printf pkg-name
+         (remote-package-checksum `(url ,pkg-source) download-printf pkg-name
                                   #:type type
-                                  #:catalog-lookup-cache catalog-lookup-cache))]
+                                  #:catalog-lookup-cache catalog-lookup-cache
+                                  #:remote-checksum-cache remote-checksum-cache))]
     [(file)
      (define checksum-pth (format "~a.CHECKSUM" pkg-source))
      (or (and (file-exists? checksum-pth)
@@ -54,7 +56,8 @@
      (or given-checksum
          (remote-package-checksum `(catalog ,pkg-source) download-printf pkg-name
                                   #:type type
-                                  #:catalog-lookup-cache catalog-lookup-cache))]
+                                  #:catalog-lookup-cache catalog-lookup-cache
+                                  #:remote-checksum-cache remote-checksum-cache))]
     [else given-checksum]))
 
 (define (disallow-package-path-overlaps pkg-name
@@ -128,6 +131,7 @@
          #:update-implies? update-implies?
          #:update-cache update-cache
          #:catalog-lookup-cache catalog-lookup-cache
+         #:remote-checksum-cache remote-checksum-cache
          #:updating? updating-all?
          #:extra-updating extra-updating
          #:ignore-checksums? ignore-checksums?
@@ -145,6 +149,7 @@
          #:local-docs-ok? local-docs-ok?
          #:ai-cache ai-cache
          #:clone-info clone-info
+         #:pull-behavior pull-behavior
          descs)
   (define download-printf (if quiet? void printf/flush))
   (define check-sums? (not ignore-checksums?))
@@ -216,7 +221,7 @@
          (cons
           #f ; no repo change
           ;; The `do-it` thunk:
-          (lambda ()
+          (lambda (fail-repos)
             (unless quiet?
               (download-printf "Promoting ~a from auto-installed to explicitly installed\n" pkg-name))
             (update-pkg-db! pkg-name (update-auto existing-pkg-info #f))))]
@@ -413,6 +418,7 @@
                                                          #:update-cache update-cache
                                                          #:namespace metadata-ns
                                                          #:catalog-lookup-cache catalog-lookup-cache
+                                                         #:remote-checksum-cache remote-checksum-cache
                                                          #:all-platforms? all-platforms?
                                                          #:ignore-checksums? ignore-checksums?
                                                          #:use-cache? use-cache?
@@ -522,6 +528,7 @@
                                                                #:update-cache update-cache
                                                                #:namespace metadata-ns
                                                                #:catalog-lookup-cache catalog-lookup-cache
+                                                               #:remote-checksum-cache remote-checksum-cache
                                                                #:all-platforms? all-platforms?
                                                                #:ignore-checksums? ignore-checksums?
                                                                #:use-cache? use-cache?
@@ -552,13 +559,14 @@
                   (clean!)
                   (report-mismatch update-deps)])]))]
       [else
+       (define repo (and git-dir
+                         (enclosing-path-for-repo (caddr orig-pkg) git-dir)))
        (cons
         ;; The repo to get new commits, if any:
-        (and git-dir
-             (list (enclosing-path-for-repo (caddr orig-pkg) git-dir)
-                   checksum))
+        (and repo (list repo
+                        checksum))
         ;; The "do-it" function (see `repos+do-its` below):
-        (λ ()
+        (λ (fail-repos)
           (when updating?
             (download-printf "Re-installing ~a\n" pkg-name))
           (define final-pkg-dir
@@ -595,8 +603,14 @@
               (and (path? name)
                    (regexp-match? #rx"[+]" name)
                    (path->string name))))
+          (define new-checksum
+            (if (hash-ref fail-repos repo #f)
+                ;; Failed `git pull` => record checksum as #f, because we've lost track
+                ;; of the state of this package:
+                #f
+                checksum))
           (define this-pkg-info
-            (make-pkg-info orig-pkg checksum auto? single-collect alt-dir-name))
+            (make-pkg-info orig-pkg new-checksum auto? single-collect alt-dir-name))
           (log-pkg-debug "updating db with ~e to ~e" pkg-name this-pkg-info)
           (update-pkg-db! pkg-name this-pkg-info)))]))
   (define metadata-ns (make-metadata-namespace))
@@ -609,6 +623,7 @@
                           check-sums? download-printf
                           metadata-ns
                           #:catalog-lookup-cache catalog-lookup-cache
+                          #:remote-checksum-cache remote-checksum-cache
                           #:strip strip-mode
                           #:force-strip? force-strip?
                           #:link-dirs? link-dirs?)))
@@ -653,25 +668,50 @@
   ;; to check them out; if a checkout fails, then we've left the
   ;; package installation in no worse shape than if a manual `git
   ;; pull` failed
-  (for ([(git-dir checksums) (in-hash repos)])
-    (parameterize ([current-directory git-dir])
-      (download-printf "Merging commits at ~a\n"
-                       git-dir)
-      (when ((length checksums) . > . 1)
-        (download-printf (~a "Multiple packages in the of the clone\n"
-                             "  " git-dir "\n"
-                             " have different target commits; will try each commit, which will work\n"
-                             " as long as some commit is a fast-forward of all of them\n")))
-      (for ([checksum (in-list checksums)])
-        (git #:status (lambda (s) (download-printf "~a\n" s))
-             "merge" "--ff-only" checksum))))
+  (define fail-repos
+    (for/fold ([fail-repos #hash()]) ([(git-dir checksums) (in-hash repos)])
+      (parameterize ([current-directory git-dir])
+        (download-printf "Merging commits at ~a\n"
+                         git-dir)
+        (when ((length checksums) . > . 1)
+          (download-printf (~a "Multiple packages in the of the clone\n"
+                               "  " git-dir "\n"
+                               " have different target commits; will try each commit, which will work\n"
+                               " as long as some commit is a fast-forward of all of them\n")))
+        (for/fold ([fail-repos fail-repos]) ([checksum (in-list checksums)])
+          (define rebase? (eq? pull-behavior 'rebase))
+          (define ok?
+            (git #:status (lambda (s) (download-printf "~a\n" s))
+                 #:fail-mode 'status
+                 (if rebase? "rebase" "merge")
+                 (if rebase? "--onto" "--ff-only")
+                 checksum))
+          (cond
+           [ok? fail-repos]
+           [else
+            (case pull-behavior
+              [(try)
+               (download-printf (~a "Pulling commits failed, but continuing anyway~a\n")
+                                (if from-command-line?
+                                    " due to `--pull try'"
+                                    ""))
+               (hash-set fail-repos git-dir #t)]
+              [else
+               (pkg-error (~a "pulling commits to clone failed~a\n"
+                              "  clone: ~a\n"
+                              "  target commit: ~a")
+                          (if from-command-line?
+                              ";\n fix clone manually or use `--pull try' or `--pull rebase'"
+                              "")
+                          git-dir
+                          checksum)])])))))
 
   ;; pre-succeed removes packages that are being updated
   (pre-succeed)
 
   (define post-metadata-ns (make-metadata-namespace))
   ;; moves packages into place and installs links:
-  (for-each (λ (t) ((cdr t))) repo+do-its)
+  (for-each (λ (t) ((cdr t) fail-repos)) repo+do-its)
 
   (define (is-promote? info)
     ;; if the package name is in `current-scope-db', we must
@@ -776,6 +816,7 @@
                      #:update-implies? [update-implies? #t]
                      #:update-cache [update-cache (make-hash)]
                      #:catalog-lookup-cache [catalog-lookup-cache (make-hash)]
+                     #:remote-checksum-cache [remote-checksum-cache (make-hash)]
                      #:updating? [updating? #f]
                      #:quiet? [quiet? #f]
                      #:use-trash? [use-trash? #f]
@@ -789,6 +830,7 @@
                      #:repo-descs [old-repo-descs (initial-repo-descs
                                                    (read-pkg-db)
                                                    (if quiet? void printf/flush))]
+                     #:pull-behavior [pull-behavior 'ff-only]
                      #:convert-to-non-clone? [convert-to-non-clone? #f])
   (define download-printf (if quiet? void printf/flush))
   
@@ -834,6 +876,7 @@
                        #:update-implies? update-implies?
                        #:update-cache update-cache
                        #:catalog-lookup-cache catalog-lookup-cache
+                       #:remote-checksum-cache remote-checksum-cache
                        #:pre-succeed (lambda () (pre-succeed) (more-pre-succeed))
                        #:updating? updating?
                        #:quiet? quiet?
@@ -844,6 +887,7 @@
                        #:force-strip? force-strip?
                        #:multi-clone-behavior (vector-ref clone-info 0)
                        #:repo-descs (vector-ref clone-info 1)
+                       #:pull-behavior pull-behavior
                        (for/list ([dep (in-list deps)])
                          (if (pkg-desc? dep)
                              dep
@@ -862,6 +906,7 @@
        #:update-implies? update-implies?
        #:update-cache update-cache
        #:catalog-lookup-cache catalog-lookup-cache
+       #:remote-checksum-cache remote-checksum-cache
        #:pre-succeed (λ ()
                        (for ([pkg-name (in-hash-keys extra-updating)])
                          ((remove-package #t quiet? use-trash?) pkg-name))
@@ -879,6 +924,7 @@
        #:ai-cache (box #f)
        #:clone-info (vector clone-behavior
                             repo-descs)
+       #:pull-behavior pull-behavior
        new-descs)
       (unless (empty? summary-deps)
         (unless quiet?
@@ -913,6 +959,7 @@
                              #:implies? implies?
                              #:namespace metadata-ns 
                              #:catalog-lookup-cache catalog-lookup-cache
+                             #:remote-checksum-cache remote-checksum-cache
                              #:update-cache update-cache
                              #:all-platforms? all-platforms?
                              #:ignore-checksums? ignore-checksums?
@@ -944,7 +991,8 @@
                                                     name
                                                     (pkg-desc-checksum pkg-name)
                                                     download-printf
-                                                    #:catalog-lookup-cache catalog-lookup-cache))
+                                                    #:catalog-lookup-cache catalog-lookup-cache
+                                                    #:remote-checksum-cache remote-checksum-cache))
       (hash-set! update-cache name new-checksum) ; record downloaded checksum
       (unless (or ignore-checksums? (not (pkg-desc-checksum pkg-name)))
         (unless (equal? (pkg-desc-checksum pkg-name) new-checksum)
@@ -1077,7 +1125,8 @@
              (hash-ref update-cache pkg-name
                        (lambda ()
                          (remote-package-checksum orig-pkg download-printf pkg-name
-                                                  #:catalog-lookup-cache catalog-lookup-cache))))
+                                                  #:catalog-lookup-cache catalog-lookup-cache
+                                                  #:remote-checksum-cache remote-checksum-cache))))
            ;; Record downloaded checksum:
            (hash-set! update-cache pkg-name new-checksum)
            (or (and new-checksum
@@ -1112,7 +1161,8 @@
                     #:link-dirs? [link-dirs? #f]
                     #:infer-clone-from-dir? [infer-clone-from-dir? #f]
                     #:lookup-for-clone? [lookup-for-clone? #f]
-                    #:multi-clone-behavior [clone-behavior 'fail])
+                    #:multi-clone-behavior [clone-behavior 'fail]
+                    #:pull-behavior [pull-behavior 'ff-only])
   (define download-printf (if quiet? void printf/flush))
   (define metadata-ns (make-metadata-namespace))
   (define db (read-pkg-db))
@@ -1122,6 +1172,7 @@
                 [else in-pkgs]))
   (define update-cache (make-hash))
   (define catalog-lookup-cache (make-hash))
+  (define remote-checksum-cache (make-hash))
   (define to-updat* (append-map (packages-to-update download-printf db
                                                     #:must-update? (and (not all-mode?)
                                                                         (not update-deps?))
@@ -1131,6 +1182,7 @@
                                                     #:update-cache update-cache
                                                     #:namespace metadata-ns
                                                     #:catalog-lookup-cache catalog-lookup-cache
+                                                    #:remote-checksum-cache remote-checksum-cache
                                                     #:all-platforms? all-platforms?
                                                     #:ignore-checksums? ignore-checksums?
                                                     #:use-cache? use-cache?
@@ -1195,6 +1247,7 @@
       #:update-implies? update-implies?
       #:update-cache update-cache
       #:catalog-lookup-cache catalog-lookup-cache
+      #:remote-checksum-cache remote-checksum-cache
       #:quiet? quiet?
       #:use-trash? use-trash?
       #:from-command-line? from-command-line?
@@ -1210,6 +1263,7 @@
       #:convert-to-non-clone? (and lookup-for-clone?
                                    (andmap pkg-desc? in-pkgs)
                                    (not (ormap pkg-desc-extra-path in-pkgs)))
+      #:pull-behavior pull-behavior
       to-update)]))
 
 ;; ----------------------------------------
diff --git a/racket/collects/pkg/private/stage.rkt b/racket/collects/pkg/private/stage.rkt
index bdef9583f3..281990f05b 100644
--- a/racket/collects/pkg/private/stage.rkt
+++ b/racket/collects/pkg/private/stage.rkt
@@ -42,22 +42,32 @@
 
 (define (remote-package-checksum pkg download-printf pkg-name
                                  #:type [type #f]
-                                 #:catalog-lookup-cache [catalog-lookup-cache #f])
-  (match pkg
-    [`(catalog ,pkg-name . ,_)
-     (hash-ref (package-catalog-lookup pkg-name #f catalog-lookup-cache
-                                       download-printf)
-               'checksum)]
-    [`(url ,pkg-url-str)
-     (package-url->checksum pkg-url-str
-                            #:type type
-                            #:download-printf download-printf
-                            #:pkg-name pkg-name)]
-    [`(clone ,_ ,pkg-url-str)
-     (package-url->checksum pkg-url-str
-                            #:type 'clone
-                            #:download-printf download-printf
-                            #:pkg-name pkg-name)]))
+                                 #:catalog-lookup-cache [catalog-lookup-cache #f]
+                                 #:remote-checksum-cache [remote-checksum-cache #f])
+  (cond
+   [(and remote-checksum-cache
+         (hash-ref remote-checksum-cache pkg #f))
+    => (lambda (checksum) checksum)]
+   [else
+    (define checksum
+      (match pkg
+        [`(catalog ,pkg-name . ,_)
+         (hash-ref (package-catalog-lookup pkg-name #f catalog-lookup-cache
+                                           download-printf)
+                   'checksum)]
+        [`(url ,pkg-url-str)
+         (package-url->checksum pkg-url-str
+                                #:type type
+                                #:download-printf download-printf
+                                #:pkg-name pkg-name)]
+        [`(clone ,_ ,pkg-url-str)
+         (package-url->checksum pkg-url-str
+                                #:type 'clone
+                                #:download-printf download-printf
+                                #:pkg-name pkg-name)]))
+    (when remote-checksum-cache
+      (hash-set! remote-checksum-cache pkg checksum))
+    checksum]))
 
 ;; Downloads a package (if needed) and unpacks it (if needed) into a  
 ;; temporary directory.
@@ -72,6 +82,7 @@
                             download-printf
                             metadata-ns
                             #:catalog-lookup-cache [catalog-lookup-cache #f]
+                            #:remote-checksum-cache [remote-checksum-cache #f]
                             #:strip [strip-mode #f]
                             #:force-strip? [force-strip? #f]
                             #:in-place? [in-place? #f]
@@ -124,7 +135,9 @@
 
     (define checksum
       (or given-checksum
-          (remote-package-checksum orig-pkg download-printf pkg-name)))
+          (remote-package-checksum orig-pkg download-printf pkg-name
+                                   #:catalog-lookup-cache catalog-lookup-cache
+                                   #:remote-checksum-cache remote-checksum-cache)))
 
     ;; If the clone directory already exists, and if it already has
     ;; the target commit, then we use that directory. It may have
@@ -225,7 +238,9 @@
       ;; then check whether it matches the expected one, but we choose
       ;; to avoid an extra trip to the server.
       (or given-checksum
-          (remote-package-checksum orig-pkg download-printf pkg-name)))
+          (remote-package-checksum orig-pkg download-printf pkg-name
+                                   #:catalog-lookup-cache catalog-lookup-cache
+                                   #:remote-checksum-cache remote-checksum-cache)))
     (when check-sums?
       (check-checksum given-checksum found-checksum "unexpected" pkg #f))
     (define checksum (or found-checksum given-checksum))
@@ -608,6 +623,7 @@
                                      download-printf
                                      metadata-ns
                                      #:catalog-lookup-cache catalog-lookup-cache
+                                     #:remote-checksum-cache remote-checksum-cache
                                      #:strip strip-mode
                                      #:force-strip? force-strip?))
     (when check-sums?