From 62907a6f0ba5f730d45c3f03386d091c323bcde5 Mon Sep 17 00:00:00 2001
From: "Ross A. Baker" <ross@rossabaker.com>
Date: Thu, 5 Mar 2026 22:57:53 -0500
Subject: [PATCH] Use sysroot to hide system paths

---
 modules/native.nix | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/modules/native.nix b/modules/native.nix
index beac9f9..06d1fbb 100644
--- a/modules/native.nix
+++ b/modules/native.nix
@@ -3,6 +3,19 @@
 with lib;
 let
   cfg = config.typelevelShell.native;
+
+  clang = if pkgs.stdenv.isLinux then
+    pkgs.runCommand "sysrooted-clang" { } ''
+      mkdir -p $out/bin
+      for bin in clang clang++; do
+        cat > $out/bin/$bin <<EOF
+#!${pkgs.runtimeShell}
+exec "${pkgs.clang}"/bin/$bin --sysroot="${pkgs.glibc.dev}" "\$@"
+EOF
+        chmod +x $out/bin/$bin
+      done
+      ''
+    else pkgs.clang;
 in
 {
   options.typelevelShell.native = {
@@ -17,7 +30,7 @@ in
 
   config = mkIf cfg.enable {
     devshell.packages = [
-      pkgs.clang
+      clang
       pkgs.llvmPackages.libcxx
     ] ++ flatten (map (e: [ (getDev e) (getLib e) ]) cfg.libraries);
 
@@ -30,10 +43,6 @@ in
         name = "C_INCLUDE_PATH";
         prefix = "$DEVSHELL_DIR/include";
       }
-      {
-        name = "LLVM_BIN";
-        value = "${pkgs.clang}/bin";
-      }
     ];
   };
 }