Simplify flake and expose host pkgs

The configuration of the machines is now moved to m/

m/xeon08/configuration.nix

@@ -0,0 +1,37 @@
+{ config, pkgs, lib, modulesPath, ... }:
+
+{
+  imports = [
+    ../common/main.nix
+    #(modulesPath + "/installer/netboot/netboot-minimal.nix")
+
+    ./kernel/kernel.nix
+    ./cpufreq.nix
+    ./fs.nix
+    ./users.nix
+    ./slurm.nix
+  ];
+
+  # Select this using the ID to avoid mismatches
+  boot.loader.grub.device = "/dev/disk/by-id/wwn-0x55cd2e414d53564b";
+
+  # disable automatic garbage collector
+  nix.gc.automatic = lib.mkForce false;
+
+  # members of the tracing group can use the lttng-provided kernel events
+  # without root permissions
+  users.groups.tracing.members = [ "arocanon" ];
+
+  # set up both ethernet and infiniband ips
+  networking = {
+    hostName = "xeon08";
+    interfaces.eno1.ipv4.addresses = [ {
+      address = "10.0.40.8";
+      prefixLength = 24;
+    } ];
+    interfaces.ibp5s0.ipv4.addresses = [ {
+      address = "10.0.42.8";
+      prefixLength = 24;
+    } ];
+  };
+}