diff --git a/modules/services/server/hydra.nix b/modules/services/server/hydra.nix
index 6f6d9e6..521060c 100644
--- a/modules/services/server/hydra.nix
+++ b/modules/services/server/hydra.nix
@@ -51,6 +51,7 @@
 
     nix = {
       settings = {
+        cores = 4;
         trusted-users = [
           "hydra"
         ];