nac3artiq: type check host int bound instead of panic when codegen

flake.nix

@@ -148,7 +148,7 @@
   };
 
   nixConfig = {
-    extra-trusted-public-keys = "nixbld.m-labs.hk-1:5aSRVA5b320xbNvu30tqxVPXpld73bhtOeH6uAjRyHc=";
-    extra-substituters = "https://nixbld.m-labs.hk";
+    binaryCachePublicKeys = ["nixbld.m-labs.hk-1:5aSRVA5b320xbNvu30tqxVPXpld73bhtOeH6uAjRyHc="];
+    binaryCaches = ["https://nixbld.m-labs.hk" "https://cache.nixos.org"];
   };
 }