On Tue, Jul 17, 2018 at 09:41:20PM +0100, Christopher Baines wrote:
> It was first added in cdc129dc53b1c04e9a6577f7d2b9641a0a03c32f, then again in
> db80dd4a1d7e2371bc3c300f48b84a817adb3550.
> 
> * gnu/packages/cran.scm (r-psych): Remove duplicated package definition.
> ---
>  gnu/packages/cran.scm | 33 +--------------------------------
>  1 file changed, 1 insertion(+), 32 deletions(-)
> 
> diff --git a/gnu/packages/cran.scm b/gnu/packages/cran.scm
> index fc4baa5b5..e9f4f663a 100644
> --- a/gnu/packages/cran.scm
> +++ b/gnu/packages/cran.scm
> @@ -1686,7 +1686,7 @@ problems as well as resampling based estimators of prediction error.")
>  (define-public r-psych
>    (package
>      (name "r-psych")
> -    (version "1.7.8")
> +    (version "1.8.4")
>      (source
>       (origin
>         (method url-fetch)

Does this preserve the correct source hash?