Sync to the store before registering paths.

I was getting corrupted builds, so as a test I am using the direct path where the drive is mounted rather than going through bind mounts.

nix/configuration/configuration.nix

@@ -119,6 +119,9 @@
     nix.settings.max-free = 1000000000;
     nix.settings.fallback = true;
     nix.settings.warn-dirty = false;
+    nix.settings.fsync-metadata = true;
+    # Ensure store paths are durably written to disk before registering the paths so a crash mid-build does not leave us in a corrupted state.
+    nix.settings.fsync-store-paths = true;
 
     hardware.enableRedistributableFirmware = true;
 
@@ -224,7 +227,13 @@
         (disableTests "coreutils-full")
         (disableTests "libuv")
         (final: prev: {
-          inherit (final.unoptimized) libtpms libjxl;
+          inherit (final.unoptimized)
+            libtpms
+            libjxl
+            ddrescueview
+            deno
+            mesa
+            ;
         })
         (disableOptimizationsPython3 "scipy")
         # Works but probably sets python2's scipy to be python3:

nix/configuration/flake.lock

@@ -22,11 +22,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1769524058,
-        "narHash": "sha256-zygdD6X1PcVNR2PsyK4ptzrVEiAdbMqLos7utrMDEWE=",
+        "lastModified": 1773889306,
+        "narHash": "sha256-PAqwnsBSI9SVC2QugvQ3xeYCB0otOwCacB1ueQj2tgw=",
         "owner": "nix-community",
         "repo": "disko",
-        "rev": "71a3fc97d80881e91710fe721f1158d3b96ae14d",
+        "rev": "5ad85c82cc52264f4beddc934ba57f3789f28347",
         "type": "github"
       },
       "original": {
@@ -164,11 +164,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1770197578,
-        "narHash": "sha256-AYqlWrX09+HvGs8zM6ebZ1pwUqjkfpnv8mewYwAo+iM=",
+        "lastModified": 1775036866,
+        "narHash": "sha256-ZojAnPuCdy657PbTq5V0Y+AHKhZAIwSIT2cb8UgAz/U=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "00c21e4c93d963c50d4c0c89bfa84ed6e0694df2",
+        "rev": "6201e203d09599479a3b3450ed24fa81537ebc4e",
         "type": "github"
       },
       "original": {

nix/configuration/roles/distributed_build/default.nix

@@ -56,7 +56,7 @@ let
         # "aarch64-linux"
       ];
 
-      hostName = lib.mkForce "hydra?remote-store=local?root=/home/nixworker/persist/root";
+      hostName = lib.mkForce "hydra?remote-store=local?root=/.disk/root";
     };
   };
   joined_configs =
@@ -101,7 +101,7 @@ in
         # Using an ssh-based substituter slows down the build because querying the remote store for paths takes ages.
         #
         # nix.settings.substituters = lib.mkForce [
-        #   "ssh-ng://nixworker@ns1.fizz.buzz:65122?compress=true&ssh-key=/persist/manual/ssh/root/keys/id_ed25519&remote-store=/home/nixworker/persist/root"
+        #   "ssh-ng://nixworker@ns1.fizz.buzz:65122?compress=true&ssh-key=/persist/manual/ssh/root/keys/id_ed25519&remote-store=/.disk/root"
         # ];
         # nix.settings.substitute = lib.mkForce true;
 

nix/configuration/roles/hydra/default.nix

@@ -85,7 +85,7 @@ in
     };
 
     # Nix 2.30.0 (2025-07-07) changed the build directory from /tmp to /nix/var/nix/builds which broke a number of builds because my ZFS datasets were utf8only.
-    fileSystems."/home/nixworker/persist/root/nix/var/nix/builds" = {
+    fileSystems."/.disk/root/nix/var/nix/builds" = {
       device = "tmpfs";
       fsType = "tmpfs";
       options = [
@@ -96,13 +96,13 @@ in
       ];
     };
 
-    systemd.timers."build-cache" = {
-      wantedBy = [ "timers.target" ];
-      timerConfig = {
-        OnCalendar = "*-*-* 03:00:00 America/New_York";
-        Unit = "build-cache.service";
-      };
-    };
+    # systemd.timers."build-cache" = {
+    #   wantedBy = [ "timers.target" ];
+    #   timerConfig = {
+    #     OnCalendar = "*-*-* 03:00:00 America/New_York";
+    #     Unit = "build-cache.service";
+    #   };
+    # };
 
     systemd.services."build-cache" = {
       script = ''
@@ -110,7 +110,8 @@ in
         IFS=$'\n\t'
         DIR="$( cd "$( dirname "''${BASH_SOURCE[0]}" )" && pwd )"
 
-        NIX_REMOTE='local?root=/home/nixworker/persist/root' RUST_BACKTRACE=1 RUST_LOG=nix_builder=DEBUG ${nix_builder}/bin/nix-builder build --config ${./files/nix_builder.toml} --target odo --target odo_update --target odowork --target odowork_update --target quark --target quark_update --target hydra --target hydra_update --target controller0 --target controller0_update --target controller1 --target controller1_update --target controller2 --target controller2_update --target worker0 --target worker0_update --target worker1 --target worker1_update --target worker2 --target worker2_update --target family_disks --target family_disks_update
+        #NIX_REMOTE='local?root=/.disk/root' RUST_BACKTRACE=1 RUST_LOG=nix_builder=DEBUG ${nix_builder}/bin/nix-builder build --config ${./files/nix_builder.toml} --target odo --target odo_update --target odowork --target odowork_update --target quark --target quark_update --target hydra --target hydra_update --target controller0 --target controller0_update --target controller1 --target controller1_update --target controller2 --target controller2_update --target worker0 --target worker0_update --target worker1 --target worker1_update --target worker2 --target worker2_update --target family_disks --target family_disks_update --target nixbsd
+        NIX_REMOTE='local?root=/.disk/root' RUST_BACKTRACE=1 RUST_LOG=nix_builder=DEBUG ${nix_builder}/bin/nix-builder build --config ${./files/nix_builder.toml} --target odo
       '';
       restartIfChanged = false;
       serviceConfig = {
@@ -124,13 +125,13 @@ in
 
     # TODO: This should move into nix-builder so we can only run clean when builds are passing. Otherwise partial builds will lose progress.
     # TODO: In nix-builder maybe include setting to auto delete to make room during builds if we run out of space, just in case builds are failing for a long time and prevent cleanup from running.
-    systemd.timers."clean-cache" = {
-      wantedBy = [ "timers.target" ];
-      timerConfig = {
-        OnCalendar = "*-*-01 02:00:00 America/New_York";
-        Unit = "clean-cache.service";
-      };
-    };
+    # systemd.timers."clean-cache" = {
+    #   wantedBy = [ "timers.target" ];
+    #   timerConfig = {
+    #     OnCalendar = "*-*-01 02:00:00 America/New_York";
+    #     Unit = "clean-cache.service";
+    #   };
+    # };
 
     systemd.services."clean-cache" = {
       script = ''
@@ -138,7 +139,7 @@ in
         IFS=$'\n\t'
         DIR="$( cd "$( dirname "''${BASH_SOURCE[0]}" )" && pwd )"
 
-        NIX_REMOTE='local?root=/home/nixworker/persist/root' nix-collect-garbage -d
+        NIX_REMOTE='local?root=/.disk/root' nix-collect-garbage -d
       '';
       path = with pkgs; [
         pkgs.nix

nix/configuration/roles/hydra/files/nix_builder.toml

@@ -177,3 +177,10 @@ output_directory = "/home/nixworker/persist/nix_builder"
   attr = "nixosConfigurations.family_disks.config.system.build.toplevel"
   update = true
   update_branch = "nix_update"
+
+[[targets]]
+  name = "nixbsd"
+  repo = "https://github.com/nixos-bsd/nixbsd.git"
+  revision = "828ff7a3c4ee91f548de65a963fca40eaedb171c"
+  path = "."
+  attr = "base.vmClosureInfo"

nix/configuration/roles/network/default.nix

@@ -56,15 +56,19 @@ in
     # TODO: The 127.0.0.1 address should probably be moved to a host-specific file.
     networking.extraHosts = ''
       127.0.0.1 ${config.networking.hostName}.home.arpa
-      10.216.1.1		homeserver
+      10.216.1.32		homeserver
+      fdfd:5e8a:ee2d::1:32	homeserver
       10.216.1.6		media
       10.216.1.12		odo
+      fdfd:5e8a:ee2d::1:2	odo
       10.216.1.14		neelix
       10.216.1.15		quark
+      fdfd:5e8a:ee2d::1:3	quark
       10.217.1.1		drmario
       10.217.2.1		mrmanager
-      172.16.16.245 turtle
-      172.16.16.251 stream
+      fdfd:5e8a:ee2d::2:2 mrmanager
+      172.16.16.245		turtle
+      172.16.16.251		stream
     '';
 
     networking.wireless.iwd = {

nix/configuration/roles/optimized_build/default.nix

@@ -79,9 +79,15 @@
               in
               {
                 linux_me = addConfig {
-                  # Full preemption
-                  PREEMPT = lib.mkOverride 60 lib.kernel.yes;
+                  # Server | No preemption - Run until the next tick. Highest throughput but can cause stutter.
+                  # PREEMPT = lib.mkOverride 60 lib.kernel.no;
+                  # Desktop | Preempt kernel threads only at pre-defined places that call cond_resched().
                   PREEMPT_VOLUNTARY = lib.mkOverride 60 lib.kernel.no;
+                  # Low-latency desktop | Full preemption - Kernel threads can be preempted unless they hold a spinlock or are in a no-preemption section.
+                  PREEMPT = lib.mkOverride 60 lib.kernel.yes;
+                  # RT - All kernel code is preemptible except for a few critical sections.
+                  # Middle ground | Real-time tasks preempt immediately like FULL, normal tasks run until the next tick.
+                  PREEMPT_LAZY = lib.mkOverride 90 lib.kernel.no;
 
                   # Google's BBRv3 TCP congestion Control
                   TCP_CONG_BBR = lib.kernel.yes;

nix/configuration/roles/recovery/default.nix

@@ -29,7 +29,7 @@
       }
       (lib.mkIf config.me.graphical {
         environment.systemPackages = with pkgs; [
-          ddrescueview
+          #ddrescueview
         ];
       })
     ]