'js_of_ocaml.deriving.syntax' not found

[constfun]

I could be doing this wrong, but I'm trying to compile a simple package and getting the error.

devbox% ocamlbuild -use-ocamlfind -syntax camlp4o -package js_of_ocaml -package js_of_ocaml.syntax -package deriving -package deriving.syntax -package js_of_ocaml.deriving -package js_of_ocaml.deriving.syntax spiral.native
+ ocamlfind ocamldep -syntax camlp4o -package js_of_ocaml.deriving.syntax -package js_of_ocaml.deriving -package deriving.syntax -package deriving -package js_of_ocaml.syntax -package js_of_ocaml -modules spiral.ml > spiral.ml.depends
ocamlfind: Package `js_of_ocaml.deriving.syntax' not found
Command exited with code 2.
Compilation unsuccessful after building 1 target (0 cached) in 00:00:00.

js_of_ocaml was installed using opam:

devbox% opam install js_of_ocaml
[NOTE] Package js_of_ocaml is already installed (current version is 1.4.0).

[hhugo]

js_of_ocaml require deriving package to provide js_of_ocaml.deriving.syntax.

opam install deriving should be enough

[constfun]

I forgot to mention this, but it is already installed:

devair% opam install deriving                          
[NOTE] Package deriving is already installed (current version is 0.5).

[hhugo]

have you tried to reinstall js_of_ocaml ?
what's the output of ocamlfind list | grep js_of_ocaml ?

[hhugo]

Any news ?

Note that it doesn't make any sense to compile the native version of your program with js_of_ocaml package.

• If it aims to be compiled to javascript afterward, you should build the bytecode version

ocamlbuild -use-ocamlfind -syntax camlp4o -package js_of_ocaml,js_of_ocaml.syntax,deriving,deriving.syntax,js_of_ocaml.deriving,js_of_ocaml.deriving.syntax spiral.byte

• other you should not use js_of_ocaml package

ocamlbuild -use-ocamlfind -syntax camlp4o -package js_of_ocaml.syntax,deriving,deriving.syntax,js_of_ocaml.deriving,js_of_ocaml.deriving.syntax spiral.native

[msimon]

js_of_ocaml 1.4 need deriving-ocsigen. The dev version remove this dependence.
If I were you I will pin js_of_ocaml 1.4 and modify the makefile to check for deriving and not deriving-ocsigen (they are exactly the same)

[hhugo]

reopen if needed