diff --git a/modules/nix-conf.nix b/modules/nix-conf.nix
index eba98e8..1256bde 100644
--- a/modules/nix-conf.nix
+++ b/modules/nix-conf.nix
@@ -17,12 +17,13 @@
     package = pkgs.nixStable;
 
     settings = {
+      cores = 0; # Use all cores for builds
+      download-buffer-size = 500 * 1024 * 1024;
       experimental-features = "nix-command flakes";
       keep-outputs = true;
       keep-derivations = true;
       min-free = (toString (1024 * 1024 * 1024));
       max-free = (toString (5 * 1024 * 1024 * 1024));
-      cores = 0; # Use all cores for builds
       trusted-users = [
         "greg"
         "gregory.hellings"
diff --git a/modules/nixos/remote-builder.nix b/modules/nixos/remote-builder.nix
index 0961a80..19375ff 100644
--- a/modules/nixos/remote-builder.nix
+++ b/modules/nixos/remote-builder.nix
@@ -53,8 +53,9 @@ with lib;
         );
         uploadRunner = getExe (
           pkgs.writeShellScriptBin "uploade-to-cache-runner.sh" ''
+            sum=$(printf "$OUT_PATHS" | ${lib.getExe' pkgs.coreutils-full "sha256sum"})
             ${lib.getExe' config.systemd.package "systemd-run"} \
-                --unit "upload-$(${lib.getExe' pkgs.coreutils "date"} +%s%3N)" \
+                --unit "upload-$(${lib.getExe' pkgs.coreutils "date"} +%s%3N)-$sum" \
                 --property Type=exec \
                 --property CollectMode=inactive \
                 --property Group=nixbld \