diff --git a/pkgs/top-level/builder-defs.nix b/pkgs/top-level/builder-defs.nix
index fc5c1691f617..4efed47f6d0b 100644
--- a/pkgs/top-level/builder-defs.nix
+++ b/pkgs/top-level/builder-defs.nix
@@ -391,7 +391,7 @@ args: with args; with stringsWithDeps; with lib;
           ensureDir "$out/share/doc/$name"
 	'' + (concatStringsSep ";"
                (map 
-	         (x: ''cp "${x}" "$out/share/doc/$name || true;"'') 
+	         (x: ''cp "${x}" "$out/share/doc/$name" || true;'') 
 		 (getAttr ["extraDoc"] [] args)))) ["minInit" "defEnsureDir" "doUnpack"];
 
         realPhaseNames =