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-rw-r--r--nixos/modules/virtualisation/parallels-guest.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/nixos/modules/virtualisation/parallels-guest.nix b/nixos/modules/virtualisation/parallels-guest.nix
index 828419fb4b9..55605b388b7 100644
--- a/nixos/modules/virtualisation/parallels-guest.nix
+++ b/nixos/modules/virtualisation/parallels-guest.nix
@@ -32,7 +32,7 @@ in
       };
 
       package = mkOption {
-        type = types.package;
+        type = types.nullOr types.package;
         default = config.boot.kernelPackages.prl-tools;
         defaultText = "config.boot.kernelPackages.prl-tools";
         example = literalExample "config.boot.kernelPackages.prl-tools";