diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 38bd9007..70df7e2e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -32,10 +32,12 @@ jobs:
           check-latest: true
       - name: Install vglyph
         run: v install vglyph
-      - name: Update packages
-        run: v retry -- sudo apt -qq update
-      - name: Install X11/GL development dependencies (headers and libs)
-        run: v retry -- sudo apt install libpango1.0-dev libfontconfig1-dev libfribidi-dev libharfbuzz-dev libfreetype-dev libgl1-mesa-dri xvfb libxcursor-dev libxi-dev libxrandr-dev freeglut3-dev
+      - name: Install C development dependencies (headers and libs)
+        if: runner.os == 'Linux'
+        run: v retry -- sudo apt -qq update && v retry -- sudo apt install libpango1.0-dev libfontconfig1-dev libfribidi-dev libharfbuzz-dev libfreetype-dev libgl1-mesa-dri xvfb libxcursor-dev libxi-dev libxrandr-dev freeglut3-dev
+      - name: Install development dependencies on macos (headers and libs)
+        if: runner.os == 'macOS'
+        run: v retry -- brew install pango harfbuzz freetype2
       - name: Checkout the gui module
         uses: actions/checkout@v4
         with:
@@ -44,14 +46,10 @@ jobs:
         run: v fmt -verify -inprocess gui/
       - name: Check formatting of MD files
         run: v check-md gui/
-      - name: Run tests
-        run: v test gui/
       - name: Check syntax of examples
         run: v gui/examples/_check.vsh
-      - name: Check compilation of examples
-        run: v should-compile-all gui/examples/
 
-  compiling-with-prod:
+  compiling:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest]
@@ -59,7 +57,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     timeout-minutes: 25
     env:
-      VFLAGS: -no-parallel
+      VFLAGS: -no-parallel -cc clang
     steps:
       - name: Install V
         id: install-v
@@ -82,10 +80,10 @@ jobs:
         run: v test gui/
       - name: Check compilation of examples
         run: v should-compile-all gui/examples/
-      - name: Check compilation of examples with -prod
+      - name: Check compilation of examples with -W
         run: v gui/examples/_build.vsh
 
-  compiling-with-prod-on-windows:
+  compiling-on-windows:
     runs-on: windows-latest
     timeout-minutes: 25
     env:
@@ -96,6 +94,8 @@ jobs:
         uses: vlang/setup-v@v1.4
         with:
           check-latest: true
+      - name: Install pango and freetype
+        run: vcpkg install pango freetype
       - name: Install vglyph
         run: v install vglyph
       - name: Checkout the gui module
@@ -106,5 +106,5 @@ jobs:
         run: v test gui/
       - name: Check compilation of examples
         run: v should-compile-all gui/examples/
-      - name: Check compilation of examples with -prod
+      - name: Check compilation of examples with -W
         run: v gui/examples/_build.vsh
diff --git a/README.md b/README.md
index c1755bf8..dcbba8a3 100644
--- a/README.md
+++ b/README.md
@@ -105,7 +105,7 @@ fn main_view(window &gui.Window) gui.View {
 			gui.text(text: '${app.clicks} clicks'),
 			gui.button(
 				content: [gui.text(text: 'Click me')]
-				on_click: fn (_, _, mut w gui.Window) {
+				on_click: fn (_ &gui.Layout, mut _ gui.Event, mut w gui.Window) {
 					w.state[App]().clicks += 1
 				}
 			),
diff --git a/_view_input_test.v b/_view_input_test.v
index 22812650..e1035a8f 100644
--- a/_view_input_test.v
+++ b/_view_input_test.v
@@ -1,3 +1,10 @@
+// vtest build: false
+// TODO: this test is skipped for now on the CI, because it needs a X11 server to be running,
+// in order for clipboard copy/paste to work.
+// See these for a way to do it on the CI (which does not run a graphics service by default):
+// https://github.com/vlang/v/blob/master/.github/workflows/c2v_ci.yml#L75
+// https://github.com/vlang/v/blob/master/.github/workflows/c2v_ci.yml#L103
+// https://github.com/vlang/v/blob/master/.github/workflows/c2v_ci.yml#L130
 module gui
 
 fn test_input_delete_key_at_end_is_noop() {
diff --git a/examples/_build.vsh b/examples/_build.vsh
index 9616c268..ff11f52d 100755
--- a/examples/_build.vsh
+++ b/examples/_build.vsh
@@ -39,8 +39,8 @@ mut errors := []string{}
 for file in files {
 	_, name, _ := split_path(file)
 	output_file := join_path(output_dir, name)
-	cmd := 'v -no-parallel -prod -o ${output_file:-22s} ${file}'
-	dsp := 'v -no-parallel -prod -o ${output_file:-22s} ${os.file_name(file):-26s}'
+	cmd := 'v -no-parallel -W -o ${output_file:-22s} ${file}'
+	dsp := 'v -no-parallel -W -o ${output_file:-22s} ${os.file_name(file):-26s}'
 	print(dsp)
 	result := execute(cmd)
 	if result.exit_code == 0 {
diff --git a/examples/clicks.v b/examples/clicks.v
new file mode 100644
index 00000000..75b186c7
--- /dev/null
+++ b/examples/clicks.v
@@ -0,0 +1,26 @@
+@[has_globals]
+module main
+
+import gui
+
+__global clicks = 0
+
+fn main() {
+	mut window := gui.window(
+		title:   'Click the button:'
+		width:   300
+		height:  40
+		on_init: fn (mut w gui.Window) {
+			w.update_view(fn (mut window gui.Window) gui.View {
+				return gui.button(
+					padding:  gui.pad_tblr(5, 120)
+					content:  [gui.text(text: 'Clicks: ${clicks}')]
+					on_click: fn (_ &gui.Layout, mut _ gui.Event, mut w gui.Window) {
+						clicks++
+					}
+				)
+			})
+		}
+	)
+	window.run()
+}