Move implementation into a let definition

clusters/fs1/fs1-0.nix

@@ -0,0 +1,29 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, ... }:
+
+{
+  imports = [ ];
+
+  boot.initrd.availableKernelModules = [ "ata_piix" "mptspi" "floppy" "sd_mod" "sr_mod" ];
+  boot.kernelModules = [ ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-uuid/6b3d4c49-9719-49b3-8210-d53374cd0eff";
+      fsType = "ext4";
+    };
+  fileSystems."/var/log" =
+    { device = "/dev/disk/by-uuid/c1e78683-4fde-4029-a9f3-7631df649b2f";
+      fsType = "ext4";
+    };
+  fileSystems."/vol/brick0" =
+    { device = "/dev/gfs_vg/brick0";
+      fsType = "ext4";
+    };
+
+  swapDevices = [ ];
+
+  nix.maxJobs = lib.mkDefault 1;
+}