diff --git a/pkgs/os-specific/darwin/by-name/ne/network_cmds/package.nix b/pkgs/os-specific/darwin/by-name/ne/network_cmds/package.nix
index 51455f86897f..39faf051ad14 100644
--- a/pkgs/os-specific/darwin/by-name/ne/network_cmds/package.nix
+++ b/pkgs/os-specific/darwin/by-name/ne/network_cmds/package.nix
@@ -32,17 +32,16 @@ let
         '${xnu}/libkern/firehose/firehose_types_private.h' \
         '${xnu}/libkern/firehose/tracepoint_private.h'
 
-      for dir in arm i386 kern machine; do
+      for dir in arm kern machine; do
         mkdir -p "$out/include/$dir"
         for file in '${xnuHeaders}/include/'$dir/*; do
           name=$(basename "$file")
-          # Skip copying `endian.h` because it conflicts with the SDK, breaking the build on x86_64-darwin.
+          # Skip copying `endian.h` because it conflicts with the SDK, breaking the build.
           test "$name" != endian.h && cp -r "$file" "$out/include/$dir/$name"
         done
       done
 
       unifdef -x 1 -DKERNEL_PRIVATE -o "$out/include/arm/locks.h" '${xnu}/osfmk/arm/locks.h'
-      unifdef -x 1 -DKERNEL_PRIVATE -o "$out/include/i386/locks.h" '${xnu}/osfmk/i386/locks.h'
 
       install -D -t "$out/include/net" \
         '${xnuHeaders}/include/net/bpf.h' \