diff --git a/extra/shell/shell.factor b/extra/shell/shell.factor
index 57a7a7a327..7f30104e21 100644
--- a/extra/shell/shell.factor
+++ b/extra/shell/shell.factor
@@ -1,7 +1,7 @@
 
 USING: kernel parser words continuations namespaces debugger
-       sequences combinators prettyprint
-       system io io.files io.launcher sequences.deep
+       sequences combinators splitting prettyprint
+       system io io.files io.launcher io.encodings.utf8 sequences.deep
        accessors multi-methods newfx shell.parser ;
 
 IN: shell
@@ -44,6 +44,19 @@ METHOD: expand { glob-expr }
 
 METHOD: expand { factor-expr } expr>> eval unparse ;
 
+DEFER: expansion
+
+METHOD: expand { back-quoted-expr }
+  expr>>
+  expr
+  ast>>
+  command>>
+  expansion
+  utf8 <process-stream>
+  contents
+  " \n" split
+  "" remove ;
+
 METHOD: expand { object } ;
 
 ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
diff --git a/extra/update/update.factor b/extra/update/update.factor
index f186837548..9b10ea746f 100644
--- a/extra/update/update.factor
+++ b/extra/update/update.factor
@@ -1,5 +1,6 @@
 
 USING: kernel system sequences io.files io.launcher bootstrap.image
+       http.client
        builder.util builder.release.branch ;
 
 IN: update
@@ -23,7 +24,7 @@ IN: update
 : remote-clean-image ( -- url )
   "http://factorcode.org/images/clean/" my-boot-image-name append ;
 
-: download-clean-image ( -- ) { "wget" remote-clean-image } run-command ;
+: download-clean-image ( -- ) remote-clean-image download ;
 
 ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!