--- /dev/null
+#
+# Conditional build:
+%bcond_without ocaml_opt # native optimized binaries (bytecode is always built)
+
+# not yet available on x32 (ocaml 4.02.1), update when upstream will support it
+%ifnarch %{ix86} %{x8664} %{arm} aarch64 ppc sparc sparcv9
+%undefine with_ocaml_opt
+%endif
+
+Summary: Monadic let-bindings
+Summary(pl.UTF-8): Monadowe wiązania let
+Name: ocaml-ppx_let
+Version: 0.14.0
+Release: 1
+License: MIT
+Group: Libraries
+#Source0Download: https://github.com/janestreet/ppx_let/tags
+Source0: https://github.com/janestreet/ppx_let/archive/v%{version}/ppx_let-%{version}.tar.gz
+# Source0-md5: 6ded2e26e4207d0c9bf38ee71b4940c7
+URL: https://github.com/janestreet/ppx_let
+BuildRequires: ocaml >= 1:4.04.2
+BuildRequires: ocaml-base-devel >= 0.14
+BuildRequires: ocaml-base-devel < 0.15
+BuildRequires: ocaml-dune >= 2.0.0
+BuildRequires: ocaml-ppxlib-devel >= 0.11.0
+%requires_eq ocaml-runtime
+BuildRoot: %{tmpdir}/%{name}-%{version}-root-%(id -u -n)
+
+%define debug_package %{nil}
+
+%description
+A ppx rewriter for monadic and applicative let bindings, match
+expressions, and if expressions.
+
+This package contains files needed to run bytecode executables using
+ppx_let library.
+
+%description -l pl.UTF-8
+Moduł przepisujący ppx do monadowych oraz aplikatywnych wiązań let,
+wyrażeń match i wyrażeń if.
+
+Pakiet ten zawiera binaria potrzebne do uruchamiania programów
+używających biblioteki ppx_let.
+
+%package devel
+Summary: Monadic let-bindings - development part
+Summary(pl.UTF-8): Monadowe wiązania let - cześć programistyczna
+Group: Development/Libraries
+Requires: %{name} = %{version}-%{release}
+%requires_eq ocaml
+Requires: ocaml-base-devel >= 0.14
+Requires: ocaml-ppxlib-devel >= 0.11.0
+
+%description devel
+This package contains files needed to develop OCaml programs using
+ppx_let library.
+
+%description devel -l pl.UTF-8
+Pakiet ten zawiera pliki niezbędne do tworzenia programów w OCamlu
+używających biblioteki ppx_let.
+
+%prep
+%setup -q -n ppx_let-%{version}
+
+%build
+dune build --verbose
+
+%install
+rm -rf $RPM_BUILD_ROOT
+
+dune install --destdir=$RPM_BUILD_ROOT
+
+# sources
+%{__rm} $RPM_BUILD_ROOT%{_libdir}/ocaml/ppx_let/*.ml
+%{__rm} $RPM_BUILD_ROOT%{_libdir}/ocaml/ppx_let/*/*.ml
+# packaged as %doc
+%{__rm} -r $RPM_BUILD_ROOT%{_prefix}/doc/ppx_let
+
+%clean
+rm -rf $RPM_BUILD_ROOT
+
+%files
+%defattr(644,root,root,755)
+%doc CHANGES.md LICENSE.md README.md
+%dir %{_libdir}/ocaml/ppx_let
+%attr(755,root,root) %{_libdir}/ocaml/ppx_let/ppx.exe
+%{_libdir}/ocaml/ppx_let/META
+%{_libdir}/ocaml/ppx_let/*.cma
+%dir %{_libdir}/ocaml/ppx_let/expander
+%{_libdir}/ocaml/ppx_let/expander/*.cma
+%if %{with ocaml_opt}
+%attr(755,root,root) %{_libdir}/ocaml/ppx_let/*.cmxs
+%attr(755,root,root) %{_libdir}/ocaml/ppx_let/expander/*.cmxs
+%endif
+
+%files devel
+%defattr(644,root,root,755)
+%{_libdir}/ocaml/ppx_let/*.cmi
+%{_libdir}/ocaml/ppx_let/*.cmt
+%{_libdir}/ocaml/ppx_let/*.cmti
+%{_libdir}/ocaml/ppx_let/*.mli
+%{_libdir}/ocaml/ppx_let/expander/*.cmi
+%{_libdir}/ocaml/ppx_let/expander/*.cmt
+%{_libdir}/ocaml/ppx_let/expander/*.cmti
+%{_libdir}/ocaml/ppx_let/expander/*.mli
+%if %{with ocaml_opt}
+%{_libdir}/ocaml/ppx_let/ppx_let.a
+%{_libdir}/ocaml/ppx_let/*.cmx
+%{_libdir}/ocaml/ppx_let/*.cmxa
+%{_libdir}/ocaml/ppx_let/expander/ppx_let_expander.a
+%{_libdir}/ocaml/ppx_let/expander/*.cmx
+%{_libdir}/ocaml/ppx_let/expander/*.cmxa
+%endif
+%{_libdir}/ocaml/ppx_let/dune-package
+%{_libdir}/ocaml/ppx_let/opam