added distributed build

hosts/Ratchet/misc_Ratchet.nix

@@ -0,0 +1,24 @@
+{ config, pkgs, ...}:
+{
+  nix.buildMachines = [ {
+	 hostName = "Aphelion";
+	 system = "x86_64-linux";
+         protocol = "ssh-ng";
+	 # if the builder supports building for multiple architectures, 
+	 # replace the previous line by, e.g.
+	 # systems = ["x86_64-linux" "aarch64-linux"];
+	 maxJobs = 16;
+	 speedFactor = 2;
+	 supportedFeatures = [ "nixos-test" "benchmark" "big-parallel" "kvm" ];
+	 mandatoryFeatures = [ ];
+	}] ;
+	nix.distributedBuilds = true;
+	# optional, useful when the builder has a faster internet connection than yours
+	nix.extraOptions = ''
+	  builders-use-substitutes = true
+        '';
+        nix.settings.trusted-public-keys = [
+          "Aphelion:8l9lrL3kszDTXkpA/R4ZFhSifiBoogiOIt1srgLb6Vw="
+        ];
+
+}