Ok, distributed. Maybe.

flake.nix

@@ -68,9 +68,6 @@
         nixpkgs = import stable { system = "x86_64-linux"; };
         specialArgs = inputs;
 
-        # Remote builds
-        machinesFile = ./machines.txt;
-
         # Use a different Nixpkgs import on some systems
         nodeNixpkgs.jupiter = import unstable { system = "x86_64-linux"; };
       };

hosts/prophet/default.nix

@@ -14,7 +14,10 @@
     stateVersion = "24.05";
   };
 
-  deployment.targetHost = "42f:2737:2aed:4dee:cbe4:3c73:1918:ad9b";
+  deployment = {
+    buildOnTarget = true;
+    targetHost = "42f:2737:2aed:4dee:cbe4:3c73:1918:ad9b";
+  };
 
   networking.hostId = "97a21a38";
 }

machines.txt

@@ -1,5 +0,0 @@
-ssh://midas x86_64-linux
-ssh://kitty x86_64-linux
-ssh://detritus x86_64-linux
-ssh://elder x86_64-linux
-ssh://prophet aarch64-linux

modules/home/programs/terminal/ssh/default.nix

@@ -5,17 +5,10 @@
     addKeysToAgent = "yes";
     compression = true;
     matchBlocks = {
-      # Personal devices
-      tower.hostname = "4e4:535:9d47:f367:becd:6557:458d:5b1b";
-      intuos.hostname = "40e:404:a427:da33:163e:97b3:a2a3:9ed4";
-      jupiter.hostname = "5ce:969c:40d1:9575:f5e:591d:c377:a20b";
-
       # Personal servers
-      midas.hostname = "538:e163:87ba:f847:3646:18b6:6b01:d8f8";
+      sv1.hostname = "sv1.nixfox.ca";
-      kitty.hostname = "53f:dc2d:80c9:3ca2:4b15:ef4d:38a0:c868";
+      sv2.hostname = "sv2.nixfox.ca";
-      detritus.hostname = "5dd:9cd7:f286:e2c7:4c3b:c2e1:7832:97a3";
+      mx.hostname = "mx.nixfox.ca";
-      elder.hostname = "570:3651:7f2:c26b:bccd:725b:be00:8a18";
-      prophet.hostname = "42f:2737:2aed:4dee:cbe4:3c73:1918:ad9b";
 
       # Other servers
       bloxel.hostname = "rtmp.bloxelcom.net";

modules/system/devices/networking/default.nix

@@ -1,6 +1,7 @@
 { config, ... }:
 {
   imports = [
+    ./hosts
     ./mounts
     ./mycelium
     ./nameservers

modules/system/devices/networking/hosts/default.nix

@@ -0,0 +1,10 @@
+{ config, lib, nodes, ... }:
+{
+  networking.hosts = with nodes; {
+    "${midas.config.deployment.targetHost}" = [ "midas" ];
+    "${kitty.config.deployment.targetHost}" = [ "kitty" ];
+    "${detritus.config.deployment.targetHost}" = [ "detritus" ];
+    "${elder.config.deployment.targetHost}" = [ "elder" ];
+    "${prophet.config.deployment.targetHost}" = [ "prophet" ];
+  };
+}

modules/system/devices/networking/mounts/default.nix

@@ -1,41 +1,34 @@
 { config, lib, nodes, ... }:
 {
   fileSystems = let
-    netOpts = [
+    common = {
-      "noauto"
+      fsType = "nfs4";
-      "soft"
+      options = [
-      "x-systemd.automount"
+        "noauto"
-    ];
+        "soft"
+        "x-systemd.automount"
+      ];
+    };
   in with nodes; {
-    "midas" = {
+    "midas" = common // {
-      device = "[${midas.config.deployment.targetHost}]:/storage";
+      device = "midas:/storage";
       mountPoint = "/network/Midas";
-      fsType = "nfs4";
-      options = netOpts;
     };
-    "kitty" = {
+    "kitty" = common // {
-      device = "[${kitty.config.deployment.targetHost}]:/storage";
+      device = "kitty:/storage";
       mountPoint = "/network/Kitty";
-      fsType = "nfs4";
-      options = netOpts;
     };
-    "detritus" = {
+    "detritus" = common // {
-      device = "[${detritus.config.deployment.targetHost}]:/storage";
+      device = "detritus:/storage";
       mountPoint = "/network/Detritus";
-      fsType = "nfs4";
-      options = netOpts;
     };
-    "elder" = {
+    "elder" = common // {
-      device = "[${elder.config.deployment.targetHost}]:/storage";
+      device = "elder:/storage";
       mountPoint = "/network/Elder";
-      fsType = "nfs4";
-      options = netOpts;
     };
-    "prophet" = {
+    "prophet" = common // {
-      device = "[${prophet.config.deployment.targetHost}]:/storage";
+      device = "prophet:/storage";
       mountPoint = "/network/Prophet";
-      fsType = "nfs4";
-      options = netOpts;
     };
   };
 }

modules/system/settings/nix/default.nix

@@ -2,6 +2,7 @@
 {
   imports = [
     ./channels
+    ./distributed
     ./gc
     ./unfree
   ];
@@ -14,10 +15,7 @@
         "nix-command"
         "flakes"
       ];
-      max-jobs = 0;
-      trusted-users = [ "root" ];
     };
-    distributedBuilds = true;
   };
 
   # Use a newer implementation of nixos-rebuild

modules/system/settings/nix/distributed/default.nix

@@ -0,0 +1,39 @@
+{ nodes, ... }:
+{
+  nix = {
+    buildMachines = with nodes; [
+      {
+        hostName = midas.config.deployment.targetHost;
+        system = midas.config.nixpkgs.localSystem.system;
+        publicHostKey = "AAAAC3NzaC1lZDI1NTE5AAAAIFcFMvrx9/iUZ1mEubf+QF1i3LNTxFhaU/1zFSjdo0kK";
+        protocol = "ssh-ng";
+      }
+      {
+        hostName = kitty.config.deployment.targetHost;
+        system = kitty.config.nixpkgs.localSystem.system;
+        publicHostKey = "AAAAC3NzaC1lZDI1NTE5AAAAIIrGmsya5DXKuXO6jNjUlrYHqk49KLzxM/60GXtLRLrL";
+        protocol = "ssh-ng";
+      }
+      {
+        hostName = detritus.config.deployment.targetHost;
+        system = detritus.config.nixpkgs.localSystem.system;
+        publicHostKey = "AAAAC3NzaC1lZDI1NTE5AAAAIN+GvLro4DVmlvmXcasU1gctIX9qct7mZtElpB735AoL";
+        protocol = "ssh-ng";
+      }
+      {
+        hostName = elder.config.deployment.targetHost;
+        system = elder.config.nixpkgs.localSystem.system;
+        publicHostKey = "AAAAC3NzaC1lZDI1NTE5AAAAIFjmJ6bkuO57gp6GZDEfR1O7krdf5wiqrOBC5pzTDl91";
+        protocol = "ssh-ng";
+      }
+      {
+        hostName = prophet.config.deployment.targetHost;
+        system = prophet.config.nixpkgs.localSystem.system;
+        publicHostKey = "AAAAC3NzaC1lZDI1NTE5AAAAICrp3Y/X2BRUENx+0GMTmB1VDA6SiwkGgdJMHSdMMepM";
+        protocol = "ssh-ng";
+      }
+    ];
+    distributedBuilds = true;
+    settings.trusted-users = [ "root" ];
+  };
+}