diff --git a/devices/pc/default.nix b/devices/pc/default.nix
index c1e59a83..560c23da 100644
--- a/devices/pc/default.nix
+++ b/devices/pc/default.nix
@@ -51,6 +51,7 @@ inputs:
             "alderlake"
           ];
           keepOutputs = true;
+          autoOptimiseStore = false;
         };
         nixpkgs =
           { march = "znver4"; cuda = { enable = true; capabilities = [ "8.9" ]; forwardCompat = false; }; };
@@ -127,7 +128,7 @@ inputs:
         nix-serve = { enable = true; hostname = "nix-store.chn.moe"; };
         smartd.enable = true;
         misskey.instances.misskey.hostname = "xn--qbtm095lrg0bfka60z.chn.moe";
-        beesd = { enable = true; instances.root = { device = "/"; hashTableSizeMB = 2048; }; };
+        beesd = { enable = true; instances.root = { device = "/"; hashTableSizeMB = 2048; threads = 4; }; };
         wireguard =
         {
           enable = true;
diff --git a/modules/services/beesd.nix b/modules/services/beesd.nix
index b9235589..7a364fdb 100644
--- a/modules/services/beesd.nix
+++ b/modules/services/beesd.nix
@@ -8,8 +8,14 @@ inputs:
       type = types.attrsOf (types.oneOf
       [
         types.nonEmptyStr
-        (types.submodule { options =
-          { device = mkOption { type = types.nonEmptyStr; }; hashTableSizeMB = mkOption { type = types.int; }; };})
+        (types.submodule
+        {
+          options =
+          {
+            device = mkOption { type = types.nonEmptyStr; };
+            hashTableSizeMB = mkOption { type = types.ints.unsigned; default = 1024; };
+            threads = mkOption { type = types.ints.unsigned; default = 1; };
+          };})
       ]);
       default = {};
     };
@@ -30,7 +36,7 @@ inputs:
             {
               spec = instance.value.device or instance.value;
               hashTableSizeMB = instance.value.hashTableSizeMB or 1024;
-              extraOptions = [ "--thread-count" "1" "--scan-mode" "3" ];
+              extraOptions = [ "--thread-count" "${toString instance.value.threads or 1}" "--scan-mode" "3" ];
             };
           })
           (attrsToList beesd.instances));
diff --git a/modules/services/xray.nix b/modules/services/xray.nix
index f91d4b14..e23b5df5 100644
--- a/modules/services/xray.nix
+++ b/modules/services/xray.nix
@@ -49,11 +49,7 @@ inputs:
                 server = [ "127.0.0.1#10853" ];
                 interface = xray.client.dns.extraInterfaces ++ [ "lo" ];
                 bind-dynamic = true;
-                ipset =
-                [
-                  "/developer.download.nvidia.com/noproxy_net"
-                  "/yuanshen.com/noproxy_net"
-                ];
+                ipset = [ "/yuanshen.com/noproxy_net" ];
                 address = map (host: "/${host.name}/${host.value}") (attrsToList xray.client.dns.hosts);
               };
             };
diff --git a/modules/system/nix.nix b/modules/system/nix.nix
index 7d9c2dc2..acb93a00 100644
--- a/modules/system/nix.nix
+++ b/modules/system/nix.nix
@@ -29,9 +29,10 @@ inputs:
             keep-failed = true;
             auto-optimise-store = nix.autoOptimiseStore;
             substituters = if nix.substituters == null then [ "https://cache.nixos.org/" ] else nix.substituters;
+            max-substitution-jobs = 1;
             trusted-public-keys = [ "chn:Cc+nowW1LIpe1kyXOZmNaznFDiH1glXmpb4A+WD/DTE=" ];
             show-trace = true;
-            max-jobs = 2;
+            max-jobs = 1;
             cores = 0;
             keep-going = true;
           };