From 01930d44eebd740c88d6b829df98600cb3bf6d3f Mon Sep 17 00:00:00 2001
From: Sridhar Ratnakumar <srid@srid.ca>
Date: Sat, 4 Sep 2021 17:20:36 -0400
Subject: [PATCH] distribute build to ryzen9

---
 features/distributed-build.nix | 21 +++++++++++++++++++++
 flake.nix                      |  2 ++
 2 files changed, 23 insertions(+)
 create mode 100644 features/distributed-build.nix

diff --git a/features/distributed-build.nix b/features/distributed-build.nix
new file mode 100644
index 0000000..76a1676
--- /dev/null
+++ b/features/distributed-build.nix
@@ -0,0 +1,21 @@
+{ config, pkgs, ... }:
+
+# https://nixos.wiki/wiki/Distributed_build
+{
+  nix.buildMachines = [{
+    hostName = "ryzen9";
+    system = "x86_64-linux";
+    # if the builder supports building for multiple architectures, 
+    # replace the previous line by, e.g.,
+    # systems = ["x86_64-linux" "aarch64-linux"];
+    maxJobs = 16;
+    speedFactor = 3;
+    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
+  '';
+}
diff --git a/flake.nix b/flake.nix
index 56b5a85..fe1c184 100644
--- a/flake.nix
+++ b/flake.nix
@@ -58,6 +58,7 @@
         ./hosts/p71.nix
         [
           inputs.nixos-hardware.nixosModules.lenovo-thinkpad-p53
+          ./features/distributed-build
           ./features/email
           ./features/desktopish
           ./features/virtualbox.nix
@@ -69,6 +70,7 @@
         ./hosts/x1c7.nix
         [
           inputs.nixos-hardware.nixosModules.lenovo-thinkpad-x1-7th-gen
+          ./features/distributed-build.nix
           ./features/email
           ./features/gnome.nix
           #./features/block-socialmedia.nix