diff --git a/pkgs/os-specific/linux/kernel/config-blocks.nix b/pkgs/os-specific/linux/kernel/config-blocks.nix
index b7ae587569eb..06564b506727 100644
--- a/pkgs/os-specific/linux/kernel/config-blocks.nix
+++ b/pkgs/os-specific/linux/kernel/config-blocks.nix
@@ -254,4 +254,10 @@ rec {
         HZ_300 y
         HZ 300
       '';
+
+      forceCFSched = ''
+        SCHED_CFS? y
+        SCHED_BFS? y
+        NO_HZ? y
+      '';
 }
diff --git a/pkgs/os-specific/linux/zen-kernel/2.6.32-zen4.nix b/pkgs/os-specific/linux/zen-kernel/2.6.32-zen4.nix
index c5dc6a3b18ba..ec52d701df5a 100644
--- a/pkgs/os-specific/linux/zen-kernel/2.6.32-zen4.nix
+++ b/pkgs/os-specific/linux/zen-kernel/2.6.32-zen4.nix
@@ -57,7 +57,7 @@ import ../kernel/generic.nix (
       ${blockDevices}
       ${bluetooth}
       ${misc}
-      ${if stdenv.lib.attrByPath ["features" "ckSched"] false args then bfsched else ""}
+      ${if stdenv.lib.attrByPath ["features" "ckSched"] false args then bfsched else forceCFSched}
     '';
 
     preConfigure = ''