1 files changed, 2 insertions, 0 deletions

diff --git a/custom/btrfs-snapshots.nix b/custom/btrfs-snapshots.nix
index 03b17d23..7114e9d9 100644
--- a/custom/btrfs-snapshots.nix
+++ b/custom/btrfs-snapshots.nix
@@ -13,11 +13,13 @@ in {
       enable = mkEnableOption "a systemd unit for btrfs snapshots";   
 
       mountPoint = mkOption {
+        readOnly = true;
         type = types.path;
         default = "/mnt";
       };
 
       mountPrefix = mkOption {
+        readOnly = true;
         type = types.str;
         default = "snapshot-";
       };