idk man

global/eraseyourdarlings.nix

@@ -1,7 +1,28 @@
 { lib, ... }:
 {
   boot.initrd.postResumeCommands = lib.mkAfter ''
-    rm -rf /bin /etc /lib64 /srv /tmp /usr /var
+    mkdir /btrfs_tmp
+    mount /dev/disk/by-label/BUTTER /btrfs_tmp
+    if [[ -e /btrfs_tmp/root ]]; then
+        mkdir -p /btrfs_tmp/old_roots
+        timestamp=$(date --date="@$(stat -c %Y /btrfs_tmp/root)" "+%Y-%m-%-d_%H:%M:%S")
+        mv /btrfs_tmp/root "/btrfs_tmp/old_roots/$timestamp"
+    fi
+
+    delete_subvolume_recursively() {
+        IFS=$'\n'
+        for i in $(btrfs subvolume list -o "$1" | cut -f 9- -d ' '); do
+            delete_subvolume_recursively "/btrfs_tmp/$i"
+        done
+        btrfs subvolume delete "$1"
+    }
+
+    for i in $(find /btrfs_tmp/old_roots/ -maxdepth 1 -mtime +1); do
+        delete_subvolume_recursively "$i"
+    done
+
+    btrfs subvolume create /btrfs_tmp/root
+    umount /btrfs_tmp
   '';
   # impermanence
   environment.persistence."/persistent" = {