nixos treewide: Fix references to linux-kernel.target

Thanks @ajs124 in
https://github.com/NixOS/nixpkgs/pull/110544#discussion_r563828722 for
catching this. According to:

    git grep 'inherit.*Platform.*platform'
    git grep ' linux-kernel'

We now don't have any remaining problems of this sort, thankfully.

2 files changed, 2 insertions, 7 deletions

diff --git a/nixos/modules/system/boot/loader/generations-dir/generations-dir.nix b/nixos/modules/system/boot/loader/generations-dir/generations-dir.nix
index fee567a510ba..1437ab387700 100644
--- a/nixos/modules/system/boot/loader/generations-dir/generations-dir.nix
+++ b/nixos/modules/system/boot/loader/generations-dir/generations-dir.nix
@@ -12,9 +12,6 @@ let
     inherit (config.boot.loader.generationsDir) copyKernels;
   };
 
-  # Temporary check, for nixos to cope both with nixpkgs stdenv-updates and trunk
-  inherit (pkgs.stdenv.hostPlatform) platform;
-
 in
 
 {
@@ -59,7 +56,7 @@ in
 
     system.build.installBootLoader = generationsDirBuilder;
     system.boot.loader.id = "generationsDir";
-    system.boot.loader.kernelFile = linux-kernel.target;
+    system.boot.loader.kernelFile = pkgs.stdenv.hostPlatform.linux-kernel.target;
 
   };
 }
diff --git a/nixos/modules/system/boot/loader/raspberrypi/raspberrypi.nix b/nixos/modules/system/boot/loader/raspberrypi/raspberrypi.nix
index 061f2967350e..1023361f0b1f 100644
--- a/nixos/modules/system/boot/loader/raspberrypi/raspberrypi.nix
+++ b/nixos/modules/system/boot/loader/raspberrypi/raspberrypi.nix
@@ -5,8 +5,6 @@ with lib;
 let
   cfg = config.boot.loader.raspberryPi;
 
-  inherit (pkgs.stdenv.hostPlatform) platform;
-
   builderUboot = import ./uboot-builder.nix { inherit pkgs configTxt; inherit (cfg) version; };
   builderGeneric = import ./raspberrypi-builder.nix { inherit pkgs configTxt; };
 
@@ -102,6 +100,6 @@ in
 
     system.build.installBootLoader = builder;
     system.boot.loader.id = "raspberrypi";
-    system.boot.loader.kernelFile = linux-kernel.target;
+    system.boot.loader.kernelFile = pkgs.stdenv.hostPlatform.linux-kernel.target;
   };
 }