diff --git a/pkgs/os-specific/linux/busybox/default.nix b/pkgs/os-specific/linux/busybox/default.nix
index e35c50450539..5a485cdcf9fe 100644
--- a/pkgs/os-specific/linux/busybox/default.nix
+++ b/pkgs/os-specific/linux/busybox/default.nix
@@ -73,6 +73,9 @@ stdenv.mkDerivation rec {
     # Set paths for console fonts.
     CONFIG_DEFAULT_SETFONT_DIR "/etc/kbd"
 
+    # Bump from 4KB, much faster I/O
+    CONFIG_FEATURE_COPYBUF_KB 64
+
     ${extraConfig}
     CONFIG_CROSS_COMPILER_PREFIX "${stdenv.cc.targetPrefix}"
     ${libcConfig}