diff --git a/nixos/modules/services/system/cachix-watch-store.nix b/nixos/modules/services/system/cachix-watch-store.nix
index 0df74b927afa..b30a57cd4926 100644
--- a/nixos/modules/services/system/cachix-watch-store.nix
+++ b/nixos/modules/services/system/cachix-watch-store.nix
@@ -36,13 +36,13 @@ in
     };
 
     compressionLevel = lib.mkOption {
-      type = lib.types.nullOr lib.types.int;
+      type = lib.types.nullOr (lib.types.ints.between 0 16);
       description = "The compression level for ZSTD compression (between 0 and 16)";
       default = null;
     };
 
     jobs = lib.mkOption {
-      type = lib.types.nullOr lib.types.int;
+      type = lib.types.nullOr lib.types.ints.positive;
       description = "Number of threads used for pushing store paths";
       default = null;
     };