feat: fw speed up builds

hosts/fw/configuration.nix

@@ -107,7 +107,21 @@
   ];
 
   nix = {
-    settings.auto-optimise-store = true;
+    settings = {
+      auto-optimise-store = true;
+      # Build performance optimizations
+      max-jobs = 4;
+      cores = 4;
+      # Enable eval caching for faster rebuilds
+      eval-cache = true;
+      # Use binary caches to avoid unnecessary rebuilds
+      substituters = [
+        "https://cache.nixos.org"
+      ];
+      trusted-public-keys = [
+        "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
+      ];
+    };
     gc = {
       automatic = true;
       dates = "weekly";
@@ -123,8 +137,8 @@
   services.tlp = {
     enable = true;
     settings = {
-      CPU_SCALING_GOVERNOR_ON_AC = "powersave"; # powersave or performance
-      CPU_ENERGY_PERF_POLICY_ON_AC = "power"; # power or performance
+      CPU_SCALING_GOVERNOR_ON_AC = "performance"; # powersave or performance
+      CPU_ENERGY_PERF_POLICY_ON_AC = "performance"; # power or performance
       # CPU_MIN_PERF_ON_AC = 0;
       # CPU_MAX_PERF_ON_AC = 100; # max 100
     };

hosts/fw/modules/microvm.nix

@@ -2,6 +2,8 @@
 {
   imports = [ (builtins.fetchGit {
     url = "https://github.com/astro/microvm.nix";
+    ref = "main";
+    rev = "42628f7c61b02d385ce2cb1f66f9be333ac20140";
   } + "/nixos-modules/host") ];
 
   systemd.network.networks."31-server".matchConfig.Name = [ "vm-*" ];