diff --git a/pkgs/development/ruby-modules/gem-config/default.nix b/pkgs/development/ruby-modules/gem-config/default.nix
index a380f9734bfd..5a3ec1f68469 100644
--- a/pkgs/development/ruby-modules/gem-config/default.nix
+++ b/pkgs/development/ruby-modules/gem-config/default.nix
@@ -21,12 +21,12 @@
 , libiconv, postgresql, v8, clang, sqlite, zlib, imagemagick, lasem
 , pkg-config , ncurses, xapian, gpgme, util-linux, tzdata, icu, libffi
 , cmake, libssh2, openssl, openssl_1_1, libmysqlclient, git, perl, pcre, pcre2, gecode_3, curl
-, msgpack, libsodium, snappy, libossp_uuid, lxc, libpcap, xorg, gtk2, buildRubyGem
+, msgpack, libsodium, snappy, libossp_uuid, lxc, libpcap, xorg, gtk2, gtk3, buildRubyGem
 , cairo, expat, re2, rake, gobject-introspection, gdk-pixbuf, zeromq, czmq, graphicsmagick, libcxx
 , file, libvirt, glib, vips, taglib, libopus, linux-pam, libidn, protobuf, fribidi, harfbuzz
 , bison, flex, pango, python3, patchelf, binutils, freetds, wrapGAppsHook, atk
 , bundler, libsass, dart-sass, libexif, libselinux, libsepol, shared-mime-info, libthai, libdatrie
-, CoreServices, DarwinTools, cctools, libtool, discount, exiv2, libmaxminddb, libyaml
+, CoreServices, DarwinTools, cctools, libtool, discount, exiv2, libepoxy, libxkbcommon, libmaxminddb, libyaml
 , autoSignDarwinBinariesHook, fetchpatch
 }@args:
 
@@ -232,6 +232,12 @@ in
     propagatedBuildInputs = [ gobject-introspection wrapGAppsHook gdk-pixbuf ];
   };
 
+  gdk3 = attrs: {
+    nativeBuildInputs = [ pkg-config bundler rake ]
+      ++ lib.optionals stdenv.isDarwin [ DarwinTools ];
+    propagatedBuildInputs = [ gobject-introspection wrapGAppsHook gdk-pixbuf cairo ];
+  };
+
   gpgme = attrs: {
     buildInputs = [ gpgme ];
     nativeBuildInputs = [ pkg-config ];
@@ -320,6 +326,36 @@ in
     dontStrip = stdenv.isDarwin;
   };
 
+  gtk3 = attrs: {
+    nativeBuildInputs = [
+      binutils
+      pkg-config
+    ] ++ lib.optionals stdenv.isLinux [
+      util-linux
+      libselinux
+      libsepol
+    ] ++ lib.optionals stdenv.isDarwin [ DarwinTools ];
+    propagatedBuildInputs = [
+      atk
+      gdk-pixbuf
+      fribidi
+      gobject-introspection
+      gtk3
+      cairo
+      harfbuzz
+      libdatrie
+      libthai
+      pcre
+      pcre2
+      xorg.libpthreadstubs
+      xorg.libXdmcp
+      xorg.libXtst
+      libxkbcommon
+      libepoxy
+    ];
+    dontStrip = stdenv.isDarwin;
+  };
+
   gobject-introspection = attrs: {
     nativeBuildInputs = [ pkg-config pcre2 ]
       ++ lib.optionals stdenv.isDarwin [ DarwinTools ];
diff --git a/pkgs/development/ruby-modules/with-packages/Gemfile b/pkgs/development/ruby-modules/with-packages/Gemfile
index ebc5d4c0b8e7..86b8618c92d3 100644
--- a/pkgs/development/ruby-modules/with-packages/Gemfile
+++ b/pkgs/development/ruby-modules/with-packages/Gemfile
@@ -66,7 +66,7 @@ gem 'glib2'
 # gem 'gobject-introspection' fails on require
 gem 'gpgme'
 # gem 'grpc' fails to build
-gem 'gtk2'
+gem 'gtk3'
 gem 'hashie'
 gem 'highline'
 gem 'hike'
diff --git a/pkgs/top-level/ruby-packages.nix b/pkgs/top-level/ruby-packages.nix
index 247cbfc21e6c..58b673e50dbc 100644
--- a/pkgs/top-level/ruby-packages.nix
+++ b/pkgs/top-level/ruby-packages.nix
@@ -1168,6 +1168,17 @@
     };
     version = "2.0.4";
   };
+  gdk3 = {
+    dependencies = ["cairo-gobject" "gdk_pixbuf2" "pango"];
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0dpqlsfv44bxzixh386qwz28wfynhwkp9qz97b6zjx4wjh4fg4gj";
+      type = "gem";
+    };
+    version = "4.2.0";
+  };
   gdk_pixbuf2 = {
     dependencies = ["gio2"];
     groups = ["default"];
@@ -1297,15 +1308,16 @@
     };
     version = "2.0.23";
   };
-  gtk2 = {
+  gtk3 = {
+    dependencies = ["atk" "gdk3"];
     groups = ["default"];
     platforms = [];
     source = {
       remotes = ["https://rubygems.org"];
-      sha256 = "09n8gz5h0d0wwrifr8c8z0b4vrd64xdi4lws8p6gpz0j0pxm5fzh";
+      sha256 = "15jk1q82g6jfswmz4b20kg2nxq4yc8wpidn9si9j7n0haxph3vxy";
       type = "gem";
     };
-    version = "3.2.6";
+    version = "4.2.0";
   };
   haml = {
     dependencies = ["temple" "thor" "tilt"];