diff --git a/installer.nix b/installer.nix
index 71fb6ee..5324fd7 100644
--- a/installer.nix
+++ b/installer.nix
@@ -92,6 +92,7 @@ if nix eval --refresh --json  "''${FLAKE_BASE_URL}#nixosConfigurations.''${choic
         --flake "''${FLAKE_BASE_URL}#''${choice}"
 else
     echo "Selected host has no Disko configuration."
+    exit 1
 fi
 
 mkdir -p /mnt/install-tmp