Allow for $post to be already set by linkdepth-specific code

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/nailing-cargo b/nailing-cargo
index 1489f7fb6c1802a3cbb944d481b3c49794d6f806..dc96c1dc20734484ef157ddaa5a5641566966d92 100755 (executable)
--- a/nailing-cargo
+++ b/nailing-cargo
@@ -663,7 +663,7 @@ END_DEEP
           cp -- "$src"/Cargo.lock .;
         fi;
 ENDLK
-    $post = <<'ENDCLEAN' if $oot_clean && !$just_linkfarm;
+    $post .= <<'ENDCLEAN' if $oot_clean && !$just_linkfarm;
         clean;
 ENDCLEAN
   }