From c3d54620fdd8987ba5fc8ca110fd3fa521917c5f Mon Sep 17 00:00:00 2001
From: annalee <168274788+annaleeleaves@users.noreply.github.com>
Date: Mon, 13 May 2024 11:11:15 +0000
Subject: [PATCH] rubyPackages_3_{2,3}.nokogiri: add libxml2 to darwin
 buildInputs; unbreak

fix build failure on darwin:

```
checking for xmlParseDoc() in -lxml2... no
checking for xmlParseDoc() in -llibxml2... no
checking for libxml-2.0 using `pkg_config`... no
Please install either the `pkg-config` utility or the `pkg-config` rubygem.
checking for xmlParseDoc() in -lxml2... no
checking for xmlParseDoc() in -llibxml2... no
-----
extconf.rb:295:in `ensure_package_configuration'
extconf.rb:704:in `<main>'
xml2 is missing. Please locate mkmf.log to investigate how it is failing.
```
---
 pkgs/development/ruby-modules/gem-config/default.nix | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/ruby-modules/gem-config/default.nix b/pkgs/development/ruby-modules/gem-config/default.nix
index e6018b06fa99..02d014bef899 100644
--- a/pkgs/development/ruby-modules/gem-config/default.nix
+++ b/pkgs/development/ruby-modules/gem-config/default.nix
@@ -586,7 +586,7 @@ in
     ];
   };
 
-  nokogiri = attrs: {
+  nokogiri = attrs: ({
     buildFlags = [
       "--use-system-libraries"
       "--with-zlib-lib=${zlib.out}/lib"
@@ -601,7 +601,9 @@ in
       "--with-iconv-dir=${libiconv}"
       "--with-opt-include=${libiconv}/include"
     ];
-  };
+  } // lib.optionalAttrs stdenv.isDarwin {
+    buildInputs = [ libxml2 ];
+  });
 
   openssl = attrs: {
     # https://github.com/ruby/openssl/issues/369