diff --git a/systems/x86_64-linux/sgx/default.nix b/systems/x86_64-linux/sgx/default.nix
index f663b61..bfe83fe 100644
--- a/systems/x86_64-linux/sgx/default.nix
+++ b/systems/x86_64-linux/sgx/default.nix
@@ -32,6 +32,7 @@
     enable = true;
     operation = "switch";
     allowReboot = true;
+    flake = "git+https://git.hoyer.xyz/harald/nixcfg.git?ref=refs/heads/b24.05";
   };
 
   systemd.targets.sleep.enable = false;
diff --git a/systems/x86_64-linux/t15/default.nix b/systems/x86_64-linux/t15/default.nix
index 78c0b3b..43ba021 100644
--- a/systems/x86_64-linux/t15/default.nix
+++ b/systems/x86_64-linux/t15/default.nix
@@ -15,6 +15,7 @@
     enable = true;
     operation = "boot";
     allowReboot = false;
+    flake = "git+https://git.hoyer.xyz/harald/nixcfg.git?ref=refs/heads/b24.05";
   };
 
   system.stateVersion = "23.11";