nixos/stage-1: create initramfs /lib at build time

Modules built in to the kernel can attempt to load firmware before
init is started.  To guarantee the firmware is accessible to them
where they expect, /lib has to exist in the initramfs — it can't be
created later by init, because by that point the module may already
have tried and given up.

1 files changed, 4 insertions, 1 deletions

diff --git a/nixos/modules/system/boot/stage-1.nix b/nixos/modules/system/boot/stage-1.nix
index a3551f68dbe..f139902cdc8 100644
--- a/nixos/modules/system/boot/stage-1.nix
+++ b/nixos/modules/system/boot/stage-1.nix
@@ -307,7 +307,7 @@ let
       ${pkgs.buildPackages.busybox}/bin/ash -n $target
     '';
 
-    inherit linkUnits udevRules extraUtils modulesClosure;
+    inherit linkUnits udevRules extraUtils;
 
     inherit (config.boot) resumeDevice;
 
@@ -349,6 +349,9 @@ let
       [ { object = bootStage1;
           symlink = "/init";
         }
+        { object = "${modulesClosure}/lib";
+          symlink = "/lib";
+        }
         { object = pkgs.runCommand "initrd-kmod-blacklist-ubuntu" {
               src = "${pkgs.kmod-blacklist-ubuntu}/modprobe.conf";
               preferLocalBuild = true;