diff --git a/pkgs/build-support/checker/default.nix b/pkgs/build-support/checker/default.nix
index ebf977d4755f..ae25493c77c5 100644
--- a/pkgs/build-support/checker/default.nix
+++ b/pkgs/build-support/checker/default.nix
@@ -18,7 +18,9 @@ let
 	if (! isAttrs b) then s else
 	if (lib.getAttr ["_type"] "" b) == "option" then "" else
 	findInList (x : x != "") 
-		(map (x: checkAttrInclusion 
+		( map (x: if (x == "servicesProposal") # this attr will be checked at another place ( -> upstart-jobs/default.nix )
+                       then ""
+                       else checkAttrInclusion 
 			(s + "." + x) 
 			(__getAttr x a)
 			(lib.getAttr [x] null b))