add a sandstone compression recipe back in place of the default recipe, without leading to an infinite sand/sandstone generation which lead to its removal in c0a1739 in the first place

technic/machines/register/compressor_recipes.lua

@@ -10,6 +10,7 @@ end
 
 local recipes = {
 	{"default:snowblock",          "default:ice"},
+	{"default:sand 4",             "default:sandstone"},
 	{"default:desert_sand",        "default:desert_stone"},
 	{"technic:mixed_metal_ingot",  "technic:composite_plate"},
 	{"default:copper_ingot 5",     "technic:copper_plate"},
@@ -18,6 +19,15 @@ local recipes = {
 	{"technic:uranium35_ingot 5",  "technic:uranium_fuel"},
 }
 
+-- defuse the default sandstone recipe, since we have the compressor to take over in a more realistic manner
+minetest.register_craft({
+	output = "default:sand 4",
+	recipe = {
+		{'group:sand', 'group:sand'},
+                {'group:sand', 'group:sand'}
+	},
+})
+
 for _, data in pairs(recipes) do
 	technic.register_compressor_recipe({input = {data[1]}, output = data[2]})
 end