diff --git a/pkgs/servers/clickhouse/default.nix b/pkgs/servers/clickhouse/default.nix
index 063964b2f6a..02c0b4aa5e5 100644
--- a/pkgs/servers/clickhouse/default.nix
+++ b/pkgs/servers/clickhouse/default.nix
@@ -70,6 +70,9 @@ stdenv.mkDerivation rec {
 
   hardeningDisable = [ "format" ];
 
+  # Builds in 7+h with 2 cores, and ~20m with a big-parallel builder.
+  requiredSystemFeatures = [ "big-parallel" ];
+
   meta = with lib; {
     homepage = "https://clickhouse.tech/";
     description = "Column-oriented database management system";