diff --git a/luarules/gadgets/ai_ruins.lua b/luarules/gadgets/ai_ruins.lua
index 75155f12915..8faf51bcc97 100644
--- a/luarules/gadgets/ai_ruins.lua
+++ b/luarules/gadgets/ai_ruins.lua
@@ -270,6 +270,9 @@ end
 
 -- CreateUnit does not snap; Pos2BuildPos uses even vs odd grid from footprint parity.
 local function createSnappedUnit(defID, x, y, z, facing, teamID)
+	if UnitDefs[defID].customParams.modoption_blocked then
+		return nil
+	end
 	x, y, z = Spring.Pos2BuildPos(defID, x, y, z, facing)
 	return Spring.CreateUnit(defID, x, y, z, facing, teamID)
 end
diff --git a/recoil-lua-library b/recoil-lua-library
index 791fea96efc..2860744ee89 160000
--- a/recoil-lua-library
+++ b/recoil-lua-library
@@ -1 +1 @@
-Subproject commit 791fea96efc93782ac239165f15b232d5804423a
+Subproject commit 2860744ee89559e3f6b89df271922dcd756af2ca