diff --git a/sources b/sources
index 8b46ffc..60c3729 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (utop-2.17.0.tar.gz) = 0d4665f72379ef7d294517a3e3cd4e6facb109a59faa6df71fa7f9837664771a919639f035ddc41f51a60cfd4fc03c911d87c20b943a601e0abc3a1248140eab
+SHA512 (utop-2.16.0.tar.gz) = 0f6a7a85e9bbb442b217f5c28228c65fc63bafa033d178b696d461a200ef52d0d6c4f9b4ef04337e24dcd88bcf246f8163bd4851baa35a9c9e8de3aaee4d062d
diff --git a/utop.spec b/utop.spec
index 95ee2e4..e546031 100644
--- a/utop.spec
+++ b/utop.spec
@@ -1,3 +1,6 @@
+# OCaml packages not built on i686 since OCaml 5 / Fedora 39.
+ExcludeArch: %{ix86}
+
 # The OCaml code is byte compiled, not native compiled, so there are no ELF
 # objects in the binary RPM.
 %global debug_package %{nil}
@@ -5,21 +8,17 @@
 %global giturl  https://github.com/ocaml-community/utop
 
 Name:           utop
-Version:        2.17.0
+Version:        2.16.0
 Release:        %autorelease
 Summary:        Improved toplevel for OCaml
 
 License:        BSD-3-Clause
 URL:            https://ocaml-community.github.io/utop/
-VCS:            git:%{giturl}.git
+VCS :           git:%{giturl}.git
 Source:         %{giturl}/archive/%{version}/%{name}-%{version}.tar.gz
 # Upstream patch to fix the version number
 Patch:          %{name}-version.patch
 
-# OCaml packages not built on i686 since OCaml 5 / Fedora 39.
-ExcludeArch:    %{ix86}
-
-BuildSystem:    dune
 BuildRequires:  ocaml >= 4.11.0
 BuildRequires:  ocaml-alcotest-devel
 BuildRequires:  ocaml-cppo >= 1.1.2
@@ -40,9 +39,10 @@ BuildRequires:  emacs-tuareg
 Provides:       ocaml-%{name}%{?_isa} = %{version}-%{release}
 
 %description
-utop is an improved toplevel (i.e., Read-Eval-Print Loop) for OCaml.  It can
-run in a terminal or in Emacs.  It supports line editing, history, real-time
-and context sensitive completion, colors, and more.
+utop is an improved toplevel (i.e., Read-Eval-Print Loop) for
+OCaml. It can run in a terminal or in Emacs. It supports line
+editing, history, real-time and context sensitive completion,
+colors, and more.
 
 %package devel
 Summary:        Development files for %{name}
@@ -64,25 +64,32 @@ Requires:       emacs-tuareg
 Recommends:     emacs-company
 
 %description -n emacs-utop
-This package contains an Emacs front end for utop, an improved toplevel for
-OCaml.
+This package contains an Emacs front end for utop, an improved toplevel
+for OCaml.
 
 %prep
 %autosetup -p1
 
-%build -a
+%build
+%dune_build
+
 cd src/top
 emacs -batch --no-init-file --no-site-file \
     --eval "(let ((backup-inhibited t)) (loaddefs-generate \".\" \"$PWD/utop-loaddefs.el\"))"
 %_emacs_bytecompile utop.el
 cd -
 
-%install -a
+%install
+%dune_install
+
 # Install the Emacs interface
 mkdir -p %{buildroot}%{_emacs_sitestartdir}
 cp -p src/top/utop-loaddefs.* %{buildroot}%{_emacs_sitestartdir}
 cp -p src/top/utop.elc %{buildroot}%{_emacs_sitelispdir}
 
+%check
+%dune_check
+
 %files -f .ofiles
 %license LICENSE
 %doc README.md CHANGES.md