rigel machine (Zima board) is running NixOS

machines/rigel/configuration.nix

@@ -0,0 +1,3 @@
+{
+  system.stateVersion = "25.11";
+}

machines/rigel/disko.nix

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+# ---
+# schema = "single-disk"
+# [placeholders]
+# mainDisk = "/dev/disk/by-id/mmc-C9A551_0x157f3bd0"
+# ---
+# This file was automatically generated!
+# CHANGING this configuration requires wiping and reinstalling the machine
+{
+
+  boot.loader.grub.efiSupport = true;
+  boot.loader.grub.efiInstallAsRemovable = true;
+  boot.loader.grub.enable = true;
+  disko.devices = {
+    disk = {
+      main = {
+        name = "main-598d9832330c4a02b021deca9caa267b";
+        device = "/dev/disk/by-id/mmc-C9A551_0x157f3bd0";
+        type = "disk";
+        content = {
+          type = "gpt";
+          partitions = {
+            "boot" = {
+              size = "1M";
+              type = "EF02"; # for grub MBR
+              priority = 1;
+            };
+            ESP = {
+              type = "EF00";
+              size = "500M";
+              content = {
+                type = "filesystem";
+                format = "vfat";
+                mountpoint = "/boot";
+                mountOptions = [ "umask=0077" ];
+              };
+            };
+            root = {
+              size = "100%";
+              content = {
+                type = "filesystem";
+                format = "ext4";
+                mountpoint = "/";
+              };
+            };
+          };
+        };
+      };
+    };
+  };
+}