diff --git a/machines/hippocampus/servers/public/hydra.nix b/machines/hippocampus/servers/public/hydra.nix
index 71e3d7d..bca1816 100644
--- a/machines/hippocampus/servers/public/hydra.nix
+++ b/machines/hippocampus/servers/public/hydra.nix
@@ -35,7 +35,10 @@ in {
   
   nix.buildMachines = [
     { hostName = "localhost";
-      system = "x86_64-linux";
+      systems = [
+        "x86_64-linux"
+        "riscv64-linux"
+      ];
       supportedFeatures = ["kvm" "nixos-test" "big-parallel" "benchmark"];
       maxJobs = 8;
     }