From e643caf024ab272982d4793bb69a1d25402b56c1 Mon Sep 17 00:00:00 2001
From: Mazunki Hoksaas <rolferen@gmail.com>
Date: Tue, 14 Oct 2025 22:04:57 +0200
Subject: [PATCH] disable verbose warning

---
 chainloader.nix |  3 ++-
 default.nix     |  2 +-
 overlay.nix     | 16 +++++++++++++++-
 unikernel.nix   |  2 +-
 4 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/chainloader.nix b/chainloader.nix
index 627d46e11..afbbcead7 100644
--- a/chainloader.nix
+++ b/chainloader.nix
@@ -6,6 +6,7 @@
     (import ./overlay.nix {
       inherit withCcache;
       smp = false; # No SMP for chainloader
+      disableTargetWarning = true;
     })
   ],
   pkgs ? import nixpkgs {
@@ -47,5 +48,5 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [
     pkgs.buildPackages.cmake
     pkgs.buildPackages.nasm
-  ];
+  ] ++ [ pkgs.pkgsIncludeOS.suppressTargetWarningHook ];
 }
diff --git a/default.nix b/default.nix
index 0e7b270fe..7a2717374 100644
--- a/default.nix
+++ b/default.nix
@@ -2,7 +2,7 @@
   smp ? false, # Enable multcore support (SMP)
   nixpkgs ? ./pinned.nix,
   overlays ? [
-    (import ./overlay.nix { inherit withCcache; inherit smp; } )
+    (import ./overlay.nix { inherit withCcache; inherit smp; disableTargetWarning = true; } )
   ],
   pkgs ? import nixpkgs { config = {}; inherit overlays; }
 }:
diff --git a/overlay.nix b/overlay.nix
index 3dd750689..0ef600a40 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -1,5 +1,6 @@
 {
   withCcache, # Enable ccache. Requires correct permissions, see below.
+  disableTargetWarning ? true, # TODO: see https://github.com/NixOS/nixpkgs/issues/395191
   smp,      # Enable multicore support (SMP)
 } :
 final: prev: {
@@ -69,9 +70,21 @@ final: prev: {
           echo "====="
         '';
       };
+
+      suppressTargetWarningHook = prev.writeTextFile {
+        name = "suppress-target-warning-hook";
+        destination = "/nix-support/setup-hook";
+        text = ''
+          # see https://github.com/NixOS/nixpkgs/issues/395191
+          # delete this hook and downstream references once resolved
+
+          export NIX_CC_WRAPPER_SUPPRESS_TARGET_WARNING=1
+        '';
+      };
     in {
     # self.callPackage will use this stdenv.
     stdenv = final.stdenvIncludeOS.includeos_stdenv;
+    inherit suppressTargetWarningHook;
 
     # Deps
     uzlib = self.callPackage ./deps/uzlib/default.nix { };
@@ -140,7 +153,8 @@ final: prev: {
       nativeBuildInputs = [
         prev.buildPackages.cmake
         prev.buildPackages.nasm
-      ] ++ prev.lib.optionals withCcache [self.ccacheWrapper ccacheNoticeHook];
+      ] ++ prev.lib.optionals disableTargetWarning [suppressTargetWarningHook]
+        ++ prev.lib.optionals withCcache [self.ccacheWrapper ccacheNoticeHook];
 
       buildInputs = [
         self.botan2
diff --git a/unikernel.nix b/unikernel.nix
index 1aab8d755..bd0ef2b6c 100644
--- a/unikernel.nix
+++ b/unikernel.nix
@@ -49,7 +49,7 @@ includeos.stdenv.mkDerivation rec {
   nativeBuildInputs = [
     includeos.pkgs.buildPackages.nasm
     includeos.pkgs.buildPackages.cmake
-  ];
+  ] ++ [ includeos.pkgs.pkgsIncludeOS.suppressTargetWarningHook ];
 
   buildInputs = [
     includeos