diff --git a/pkgs/by-name/ka/kanidm/package.nix b/pkgs/by-name/ka/kanidm/package.nix
index 405fbfffd7813..13a20f05e70b1 100644
--- a/pkgs/by-name/ka/kanidm/package.nix
+++ b/pkgs/by-name/ka/kanidm/package.nix
@@ -100,6 +100,9 @@ rustPlatform.buildRustPackage rec {
     };
   };
 
+  # can take over 4 hours on 2 cores and needs 16GB+ RAM
+  requiredSystemFeatures = [ "big-parallel" ];
+
   meta = with lib; {
     changelog = "https://github.com/kanidm/kanidm/releases/tag/v${version}";
     description = "A simple, secure and fast identity management platform";