diff --git a/pkgs/development/ruby-modules/gem-config/default.nix b/pkgs/development/ruby-modules/gem-config/default.nix
index c79a586e5f3..9d4f5679e26 100644
--- a/pkgs/development/ruby-modules/gem-config/default.nix
+++ b/pkgs/development/ruby-modules/gem-config/default.nix
@@ -206,6 +206,13 @@ in
     buildFlags = [ "--with-system-v8=true" ];
   };
 
+  libxml-ruby = attrs: {
+    buildFlags = [
+      "--with-xml2-lib=${libxml2.out}/lib"
+      "--with-xml2-include=${libxml2.dev}/include/libxml2"
+    ];
+  };
+
   msgpack = attrs: {
     buildInputs = [ libmsgpack ];
   };