diff --git a/justfile b/justfile
index ade605b..d8b62e6 100644
--- a/justfile
+++ b/justfile
@@ -1,35 +1,42 @@
-update-config:
+hosts := "puter box"
+
+_check-host host:
+  if ! echo "{{hosts}}" | grep -qw "{{host}}"; then \
+    echo "Unknown host:{{host}} \n Must be one of: {{hosts}}"; exit 1;\
+  fi
+
+update-config: host: _check-host
     alejandra .
     nix flake update
     git add .
     git commit
-    sudo nixos-rebuild switch --upgrade --flake ~/haus#puter
+    sudo nixos-rebuild switch --upgrade --flake ~/haus#{{host}}
     git push
 
-update:
+update: host: _check-host
     nix flake update
     git add .
     git commit -m "nix flake update"
-    sudo nixos-rebuild switch --upgrade --flake ~/haus#puter
+    sudo nixos-rebuild switch --upgrade --flake ~/haus#{{host}}
     git push
 
-update-and-reboot:
+update-and-reboot: host: _check-host
     nix flake update
     git add .
     git commit -m "nix flake update"
-    sudo nixos-rebuild boot --upgrade --flake ~/haus#puter
+    sudo nixos-rebuild boot --upgrade --flake ~/haus#{{host}}
     git push
 
-update-config-and-reboot:
+update-config-and-reboot: host: _check-host
     alejandra .
     nix flake update
     git add .
     git commit
-    sudo nixos-rebuild boot --upgrade --flake ~/haus#puter
+    sudo nixos-rebuild boot --upgrade --flake ~/haus#{{host}}
     git push
 
-upgrade:
-    sudo nixos-rebuild switch --upgrade --flake ~/haus#puter
+upgrade: host: _check-host
+    sudo nixos-rebuild switch --upgrade --flake ~/haus#{{host}}
 
 clean:
     sudo nix-env --delete-generations old