diff --git a/nixos/tests/kerberos/mit.nix b/nixos/tests/kerberos/mit.nix
index 6da3a384aa9..df13992a836 100644
--- a/nixos/tests/kerberos/mit.nix
+++ b/nixos/tests/kerberos/mit.nix
@@ -21,6 +21,7 @@ import ../make-test.nix ({pkgs, ...}: {
       };
     };
     users.extraUsers.alice = { isNormalUser = true; };
+    environment.systemPackages = [ pkgs.krb5Full.dev ];
   };
 
   testScript = ''