diff --git a/machines/sirius/disko.nix b/machines/sirius/disko.nix
index f282b6b..a5ee19f 100644
--- a/machines/sirius/disko.nix
+++ b/machines/sirius/disko.nix
@@ -28,21 +28,18 @@ in
           type = "gpt";
           partitions = {
             ESP = {
-              size = "1G";
+              end = "500M";
               type = "EF00";
               content = {
                 type = "filesystem";
                 format = "vfat";
                 mountpoint = "/boot";
-                mountOptions = [
-                  "umask=0077"
-                  "nofail"
-                ];
+                mountOptions = [ "umask=0077" ];
               };
             };
             root = {
               name = "root";
-              size = "100%";
+              end = "-0";
               content = {
                 type = "filesystem";
                 format = "f2fs";