diff --git a/_service b/_service
index e6dac84..dc41c04 100644
--- a/_service
+++ b/_service
@@ -1,13 +1,13 @@
 <services>
   <service name="tar_scm" mode="disabled">
-    <param name="exclude">.depend</param>
     <param name="exclude">.github</param>
     <param name="exclude">.gitignore</param>
-    <param name="exclude">.travis.yml</param>
-    <param name="exclude">Dockerfile</param>
+    <param name="exclude">CONTRIBUTING.md</param>
     <param name="exclude">INSTALL.md</param>
     <param name="exclude">LICENSE</param>
+    <param name="exclude">NEWS.md</param>
     <param name="exclude">README.md</param>
+    <param name="exclude">dune-project</param>
     <param name="exclude">icons/.xvpics</param>
     <param name="exclude">icons/U.16x16x16m.png</param>
     <param name="exclude">icons/U.24x24x16m.png</param>
@@ -18,42 +18,42 @@
     <param name="exclude">icons/U.32x32x256.xpm</param>
     <param name="exclude">icons/U.48x48x16m.png</param>
     <param name="exclude">icons/U.ico</param>
+    <param name="exclude">icons/Unison.gif</param>
     <param name="exclude">icons/Unison.xpm</param>
     <param name="exclude">icons/success.gif</param>
     <param name="exclude">icons/svg_to_data.ml</param>
     <param name="exclude">icons/unison-icon.ai</param>
     <param name="exclude">icons/unison-logo.gif</param>
     <param name="exclude">icons/unison.haruo.jpg</param>
-    <param name="exclude">setup</param>
-    <param name="exclude">src/CONTRIB</param>
+    <param name="exclude">icons/unison.png</param>
+    <param name="exclude">icons/unison.svg</param>
     <param name="exclude">src/FEATURES.md</param>
-    <param name="exclude">src/INSTALL.gtk2</param>
-    <param name="exclude">src/INSTALL.win32-cygwin-gnuc</param>
-    <param name="exclude">src/INSTALL.win32-msvc</param>
-    <param name="exclude">src/INSTALL.win32</param>
-    <param name="exclude">src/INSTALL</param>
     <param name="exclude">src/README</param>
     <param name="exclude">src/ROADMAP.txt</param>
     <param name="exclude">src/TODO.txt</param>
-    <param name="exclude">src/fsmonitor.py</param>
-    <param name="exclude">src/fsmonitor/linux/Makefile</param>
+    <param name="exclude">src/dune</param>
+    <param name="exclude">src/fsmonitor/dune</param>
+    <param name="exclude">src/fsmonitor/inotify/dune</param>
     <param name="exclude">src/fsmonitor/solaris</param>
     <param name="exclude">src/fsmonitor/windows</param>
-    <param name="exclude">src/lwt/META</param>
-    <param name="exclude">src/lwt/depend</param>
-    <param name="exclude">src/lwt/example</param>
-    <param name="exclude">src/lwt/win</param>
+    <param name="exclude">src/lwt/dune</param>
+    <param name="exclude">src/lwt/win/dune</param>
+    <param name="exclude">src/lwt/win/lwt_win.ml</param>
+    <param name="exclude">src/lwt/win/lwt_win.mli</param>
+    <param name="exclude">src/system/system_win.ml</param>
     <param name="exclude">src/system/system_win_stubs.c</param>
     <param name="exclude">src/system/win</param>
-    <param name="exclude">src/ubase/META</param>
+    <param name="exclude">src/test.mli</param>
+    <param name="exclude">src/ubase/dune</param>
     <param name="exclude">src/uimac</param>
+    <param name="exclude">src/uimacbridge.ml</param>
     <param name="exclude">src/unison.hgr</param>
     <param name="exclude">src/win32rc</param>
-    <param name="exclude">src/winmain.c</param>
-    <param name="exclude">tests</param>
     <param name="exclude">unicode_utils</param>
+    <param name="exclude">unison-gui.opam</param>
+    <param name="exclude">unison.opam</param>
     <param name="filename">unison</param>
-    <param name="revision">574a2716a9cd5096651d80f161250bf26df9a38f</param>
+    <param name="revision">f6e8bea5d9e5a5282904fdf644ed4d7ee9b9b2ad</param>
     <param name="scm">git</param>
     <param name="submodules">disable</param>
     <param name="url">https://github.com/bcpierce00/unison.git</param>
diff --git a/unison-2.53.3.tar.xz b/unison-2.53.3.tar.xz
deleted file mode 100644
index b5b0284..0000000
--- a/unison-2.53.3.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:2c12c6a73345415ed1cf21b0d6f0213cfb42e3777beca5221fd1849398c1125b
-size 435652
diff --git a/unison-2.53.4.tar.xz b/unison-2.53.4.tar.xz
new file mode 100644
index 0000000..f30c9d8
--- /dev/null
+++ b/unison-2.53.4.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d1d6cfc5a89f9a7d71ae153bb5d7722d207a3691893e2b602e61a24a810bfe0d
+size 389860
diff --git a/unison.changes b/unison.changes
index 6a224bb..8b2ba66 100644
--- a/unison.changes
+++ b/unison.changes
@@ -1,3 +1,15 @@
+-------------------------------------------------------------------
+Tue Feb 20 20:20:20 UTC 2024 - ohering@suse.de
+
+- Update to version 2.53.4
+  * Preferences "force", "prefer" and related "partial" preferences now
+    work slightly differently with values "newer" and "older". Previously,
+    if mtimes in both replicas were equal then always the second root
+    propagated to the first root (possibly reverting user changes). It
+    is now made explicit that "newer" and "older" only work when mtimes
+    are different.
+  * Bugfixes, minor improvements, cleanups.
+
 -------------------------------------------------------------------
 Fri Jul  7 07:07:07 UTC 2023 - ohering@suse.de
 
diff --git a/unison.spec b/unison.spec
index 2aa2809..a9cfacc 100644
--- a/unison.spec
+++ b/unison.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package unison
 #
-# Copyright (c) 2023 SUSE LLC
+# Copyright (c) 2024 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -24,7 +24,7 @@
 
 %define     pkg unison
 Name:           %pkg%nsuffix
-Version:        2.53.3
+Version:        2.53.4
 Release:        0
 %{?ocaml_preserve_bytecode}
 Summary:        File synchronization tool
@@ -35,16 +35,15 @@ URL:            https://github.com/bcpierce00/unison
 Source0:        %pkg-%version.tar.xz
 Source1:        %pkg.desktop
 BuildRequires:  ocaml(ocaml_base_version) >= 4.08
-BuildRequires:  ocaml-rpm-macros >= 20230101
+BuildRequires:  ocaml-rpm-macros >= 20231101
 %if "%build_flavor" == "doc"
 %if 0%?suse_version > 1500 || 0%?sle_version > 150300
 BuildRequires:  hevea
 BuildRequires:  lynx
 %endif
-BuildRequires:  texlive-dvips
-BuildRequires:  texlive-latex
+BuildRequires:  texlive-collection-latex
+BuildRequires:  texlive-metafont
 %else
-BuildRequires:  ocaml-dune >= 2.3
 BuildRequires:  ocamlfind(lablgtk3)
 BuildRequires:  pkgconfig(ncursesw)
 %if 0%{?suse_version} > 0
@@ -79,32 +78,25 @@ replica to the other.
 
 %build
 %if "%build_flavor" == "doc"
-%make_build docs -j1
+%make_build docs
 ls -lart doc man
 %else
-dune_release_pkgs='unison,unison-gui,unison-fsmonitor'
-%ocaml_dune_setup
-%ocaml_dune_build
+%make_build PREFIX=%_prefix
 %endif
 
 %install
 %if "%build_flavor" == "doc"
-mkdir -vp %buildroot%_mandir/man1
-cp -avt %buildroot%_mandir/man1 man/%pkg.1
-echo '%%_mandir/man1/unison.*' > files
+echo '%%dir %_defaultdocdir/%pkg' > files
 for ext in html pdf
 do
   test -f doc/unison-manual.$ext || continue
   mkdir -vp %buildroot%_defaultdocdir/%pkg
   cp doc/unison-manual.$ext %buildroot%_defaultdocdir/%pkg
-  echo '%%dir %_defaultdocdir/%pkg' >> files
   echo "%%doc %_defaultdocdir/%pkg/unison-manual.$ext" >> files
 done
 %else
 echo '%%doc src/COPYING' > files
-%ocaml_dune_install
-%ocaml_create_file_list
-rm -rfv %buildroot%ocaml_standard_library
+%make_install PREFIX=%_prefix
 
 mv %buildroot%_bindir/%name %buildroot%_bindir/%name-text
 mv %buildroot%_bindir/%name-gui %buildroot%_bindir/%name
@@ -123,10 +115,10 @@ install -m 644 -D %{SOURCE1} %buildroot/%_datadir/applications/%name.desktop
 %_datadir/pixmaps/*
 %_bindir/%name
 %_bindir/%name-fsmonitor
+%_mandir/man1/*
 
 %files text
 %defattr(-,root,root,-)
-%doc src/COPYING
 %_bindir/%name-text
 %endif