increase generation cleanup limit

just in case it fails from one upgrade week to the next

disks/root.nix

@@ -7,24 +7,28 @@
         type = "gpt";
         partitions = {
           # Boot partition
-          ESP = {
+          ESP = rec {
             size = "512MiB";
             type = "EF00";
+            label = "boot";
+            device = "/dev/disk/by-label/${label}";
             content = {
               type = "filesystem";
               format = "vfat";
               mountpoint = "/boot";
-              extraArgs = [ "-n boot" ];
+              extraArgs = [ "-n ${label}" ];
             };
           };
           # Root partition ext4
-          root = {
+          root = rec {
             size = "100%";
+            label = "nixos";
+            device = "/dev/disk/by-label/${label}";
             content = {
               type = "filesystem";
               format = "ext4";
               mountpoint = "/";
-              extraArgs = [ "-L nixos" ];
+              extraArgs = [ "-L ${label}" ];
             };
           };
         };

modules/common/default.nix

@@ -123,7 +123,7 @@
 
       gc = {
         automatic = true;
-        options = "--delete-older-than 7d";
+        options = "--delete-older-than 10d";
       };
 
       settings = {