diff --git a/testing/chamo/APKBUILD b/testing/chamo/APKBUILD
index f0c1ba93dae..3bd47924e9e 100644
--- a/testing/chamo/APKBUILD
+++ b/testing/chamo/APKBUILD
@@ -1,36 +1,42 @@
 # Contributor: rubicon <rubicon@mailo.com>
-# Maintainer:
+# Maintainer: Celeste <cielesti@protonmail.com>
 pkgname=chamo
-pkgver=3.0
-pkgrel=1
+pkgver=4.0
+pkgrel=0
 pkgdesc="Emacs-inspired text editor written in and configurable with OCaml"
-url="https://zoggy.frama.io/chamo"
+url="https://framagit.org/zoggy/chamo"
 arch="all !riscv64 !loongarch64" # ocaml
 license="LGPL-3.0-only"
-# lablgtk3-sourceview3 is bundled together in ocaml-lablgtk3
+depends="
+	font-dejavu
+	font-liberation
+	"
 depends_dev="
-	ocaml-lablgtk3-dev
-	ocaml-lablgtk3-extras-dev
+	ocaml-fmt-dev
+	ocaml-integers-dev
 	ocaml-logs-dev
 	ocaml-lwt-dev
-	ocaml-lwt_ppx-dev
 	ocaml-ocf-dev
 	ocaml-pcre-dev
+	ocaml-ppx_blob-dev
+	ocaml-re-dev
 	ocaml-sedlex-dev
+	ocaml-stk-dev
 	ocaml-uutf-dev
 	ocaml-xmlm-dev
+	ocaml-xtmpl-dev
 	"
 makedepends="
 	$depends_dev
-	gnu-libiconv
+	dune
 	ocaml
-	ocaml-compiler-libs
-	ocaml-findlib
-	ocaml-ocamldoc
 	"
-options="!check"
-subpackages="$pkgname-dev"
-source="$pkgname-$pkgver.tar.bz2::https://framagit.org/zoggy/chamo/-/archive/$pkgver/chamo-$pkgver.tar.bz2"
+options="!check" # no tests provided
+subpackages="
+	$pkgname-byte
+	$pkgname-dev
+	"
+source="https://framagit.org/zoggy/chamo/-/archive/$pkgver/chamo-$pkgver.tar.bz2"
 _ocamldir=usr/lib/ocaml
 
 # 32-bit archs
@@ -39,32 +45,51 @@ case "$CARCH" in
 esac
 
 build() {
-	export ICONV=/usr/bin/gnu-iconv
-	./configure --prefix /usr
-	make -j1 all
+	dune build --release --verbose
 }
 
 package() {
-	export OCAMLFIND_DESTDIR="$pkgdir/$_ocamldir"
-	export OCAMLFIND_LDCONF=ignore
-	mkdir -vp "$OCAMLFIND_DESTDIR"
+	dune install --destdir="$pkgdir" --docdir=/.omit
 
-	local pkgdirshare="$pkgdir"/usr/share/chamo3
-	make	GLADEDIR="$pkgdirshare"/glade \
-		PIXMAPSDIR="$pkgdirshare"/pixmaps install
+	rm -v "$pkgdir"/usr/bin/chamo_byte
+}
 
-	local chamobinary="$OCAMLFIND_DESTDIR"/chamo3/chamo
-	install -Dv $chamobinary -t "$pkgdir"/usr/bin/
-	rm -v $chamobinary
+byte() {
+	pkgdesc="$pkgdesc (bytecode executable)"
+	depends="$depends ocaml-runtime"
+
+	amove usr/bin/chamo.byte
+	ln -sv chamo.byte "$subpkgdir"/usr/bin/chamo_byte
 }
 
 dev() {
-	depends="$depends_dev ocaml-runtime"
 	pkgdesc="$pkgdesc (development files)"
+	depends="$depends_dev"
 
 	amove $_ocamldir
 }
 
+prepare_py_provides() {
+	local datadir="${subpkgdir:-$pkgdir}"
+	local pkgbasedir=${pkgbasedir:-"$startdir/pkg"}
+	local controldir="$pkgbasedir"/.control.${subpkgname:-$pkgname}
+
+	options_has "!tracedeps" && return 0
+
+	ocaml4-abuild-find provides \
+		"$datadir"/usr/lib/ocaml \
+		"$controldir" \
+		"$pkgver-r$pkgrel"
+}
+
+scan_python3_dependency() {
+	local controldir="$2" datadir="$3"
+
+	ocaml4-abuild-find requires \
+		"$datadir"/usr/lib/ocaml \
+		"$controldir"
+}
+
 sha512sums="
-f5d2980bf67c5e8b98dd8e0d8eaa7fdf96c762c2bc5907d7eba3737978d27dfff76a37cea29d1470a78b77aa0114655a65c723d4eeebad8198d23703294d724d  chamo-3.0.tar.bz2
+f83be446a5b0f1178a2e854691973da41d8a1ada12098e9f0d65bde5301a6242a79a58dfb9b2f244a8548b01453eba4788d06b8ab62b8a04b29b9f6cedc31b54  chamo-4.0.tar.bz2
 "