--- a/guix/scripts.scm
+++ b/guix/scripts.scm
@@ -22,6 +22,7 @@
   #:use-module (guix utils)
   #:use-module (guix ui)
   #:use-module (guix store)
+  #:use-module (guix grafts)
   #:use-module (guix monads)
   #:use-module (guix packages)
   #:use-module (guix derivations)
@@ -105,11 +106,14 @@ true."
                         #:rest build-options)
   "Build PACKAGE using BUILD-OPTIONS acceptable by 'set-build-options'.
 Show what and how will/would be built."
-  (mbegin %store-monad
+  (mlet %store-monad ((grafting? ((lift0 %graft? %store-monad))))
     (apply set-build-options*
            #:use-substitutes? use-substitutes?
            (strip-keyword-arguments '(#:dry-run?) build-options))
-    (mlet %store-monad ((derivation (package->derivation package)))
+    (mlet %store-monad ((derivation (package->derivation package
+                                                         #:graft?
+                                                         (and (not dry-run?)
+                                                              grafting?))))
       (mbegin %store-monad
         (maybe-build (list derivation)
                      #:use-substitutes? use-substitutes?