@@ -4523,7 +4523,38 @@ speedup, polymorphic variants and optional syntax for tuples and variants.
yojson package. The program @code{atdgen} can be used to derive OCaml-JSON
serializers and deserializers from type definitions.")
(license license:bsd-3)))
-
+
+(define-public ocaml-ppx-deriving
+ (package
+ (name "ocaml-ppx-deriving")
+ (version "5.2.1")
+ (home-page "https://github.com/ocaml-ppx/ppx_deriving")
+ (source
+ (origin
+ (method git-fetch)
+ (uri (git-reference
+ (url home-page)
+ (commit (string-append "v" version))))
+ (file-name (git-file-name name version))
+ (sha256
+ (base32
+ "1wqcnw4wi6pfjjhixpakckm03dpj990259za432804471a6spm2j"))))
+ (build-system dune-build-system)
+ (arguments `(#:test-target "."))
+ (propagated-inputs
+ `(("ocaml-ppx-derivers" ,ocaml-ppx-derivers)
+ ("ocaml-ppxlib" ,ocaml-ppxlib)
+ ("ocaml-result" ,ocaml-result)))
+ (native-inputs
+ `(("ocaml-cppo" ,ocaml-cppo)
+ ("ocaml-ounit2" ,ocaml-ounit2)))
+ (properties `((upstream-name . "ppx_deriving")))
+ (synopsis "Type-driven code generation for OCaml")
+ (description "This OCaml library provides common infrastructure for
+generating code based on type definitions, and a set of useful plugins for
+common tasks.")
+ (license license:expat)))
+
(define-public ocaml-craml
(package
(name "ocaml-craml")