diff --git a/flake.nix b/flake.nix
index 08757593..a672a52d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -363,9 +363,15 @@
               #!${pkgs.runtimeShell} -ex
               ssh ${target} "time nix-collect-garbage -d && time nix-store --optimise"
             '';
-          } // lib.optionalAttrs (builtins.elem (hostConfig.c3d2.deployment.server or null) [ "server9" "server10" ]) {
+
             "microvm-update-${name}" = pkgs.writeScriptBin "microvm-update-${name}" ''
               #!${pkgs.runtimeShell} -e
+
+              ${lib.optionalString (! builtins.elem (hostConfig.c3d2.deployment.server or null) [ "server9" "server10" ]) ''
+                echo "MicroVM must be configured to proper server" >&2
+                exit 1
+              ''}
+
               ${hostConfig.system.build.copyToServer} ${inputPaths}
 
               ${hostConfig.system.build.runOnServer} bash -e <<END
@@ -393,6 +399,12 @@
 
             "microvm-update-${name}-local" = pkgs.writeScriptBin "microvm-update-${name}" ''
               #!${pkgs.runtimeShell} -e
+
+              ${lib.optionalString (! builtins.elem (hostConfig.c3d2.deployment.server or null) [ "server9" "server10" ]) ''
+                echo "MicroVM must be configured to proper server" >&2
+                exit 1
+              ''}
+
               ${hostConfig.system.build.copyToServer} ${hostConfig.microvm.declaredRunner}
 
               ${hostConfig.system.build.runOnServer} bash -e <<END
@@ -416,10 +428,14 @@
               END
             '';
 
-          } // lib.optionalAttrs (hostConfig.c3d2.deployment.server or null == "nomad") {
             "nomad-${name}" = pkgs.writeScriptBin "nomad-${name}" ''
               #!${pkgs.runtimeShell} -e
 
+              ${lib.optionalString (hostConfig.c3d2.deployment.server or null == "nomad") ''
+                echo "MicroVM must be configured for nomad" >&2
+                exit 1
+              ''}
+
               echo Copying Flakes
               nix copy --no-check-sigs --to ssh-ng://root@hydra.serv.zentralwerk.org ${secrets} ${self}