scripts/make-gpt.sh: use copy_file_range(2)

Before this change, a clean release/live "make -j4" had a median
runtime of 85 seconds.  Now, it's 37 seconds.  That much of a
reduction in iteration time is worth the extra complexity.

Signed-off-by: Alyssa Ross <hi@alyssa.is>

1 files changed, 5 insertions, 2 deletions

diff --git a/host/initramfs/default.nix b/host/initramfs/default.nix
index b9b22ae..22dcbed 100644
--- a/host/initramfs/default.nix
+++ b/host/initramfs/default.nix
@@ -1,11 +1,14 @@
-# SPDX-FileCopyrightText: 2021-2022 Alyssa Ross <hi@alyssa.is>
+# SPDX-FileCopyrightText: 2021-2023 Alyssa Ross <hi@alyssa.is>
 # SPDX-License-Identifier: MIT
 
 import ../../lib/eval-config.nix (
+
 { config, src
+, lseek ? import ../../tools/lseek { inherit config; }
 , rootfs ? import ../rootfs { inherit config; }
 , ...
 }:
+
 config.pkgs.callPackage (
 
 { lib, stdenvNoCC, makeModulesClosure, runCommand, writeReferencesToFile
@@ -89,7 +92,7 @@ stdenvNoCC.mkDerivation {
   MICROCODE = microcode;
   PACKAGES_CPIO = packagesCpio;
 
-  nativeBuildInputs = [ cpio ];
+  nativeBuildInputs = [ cpio lseek ];
 
   makeFlags = [ "dest=$(out)" ];