diff --git a/flake.nix b/flake.nix
index df03e2eb..b3bee0eb 100644
--- a/flake.nix
+++ b/flake.nix
@@ -426,6 +426,7 @@
               imports = lib.singleton "${modulesPath}/installer/cd-dvd/installation-cd-graphical-calamares-plasma5.nix";
             })
           ];
+          nixos = inputs.nixos-23-05;
         };
 
         iso-minimal = nixosSystem' {
@@ -434,6 +435,7 @@
               imports = lib.singleton "${modulesPath}/installer/cd-dvd/installation-cd-minimal.nix";
             })
           ];
+          nixos = inputs.nixos-23-05;
         };
 
         jabber = nixosSystem' {