ppx_deriving_yojson depends on the result compatibility package but wasn't declaring this dependency explicitly.
This used to work because ppx_deriving also depended on result but since it will not be the case anymore starting from ppx_deriving.6.0.0, this needs to be updated.
It's likely that we will drop this dependency for the same reasons ppx_deriving did but in the meantime it does not cost much to update our opam file.
ppx_deriving_yojson depends on the result compatibility package but wasn't declaring this dependency explicitly.
This used to work because ppx_deriving also depended on result but since it will not be the case anymore starting from ppx_deriving.6.0.0, this needs to be updated.
It's likely that we will drop this dependency for the same reasons ppx_deriving did but in the meantime it does not cost much to update our opam file.