Hilton Chain via Guix-patches via <guix-patches@gnu.org> writes:

>  (define-public tree-sitter-javascript
> +  ;; Required by tree-sitter-typescript.
> +  (let ((commit "7a29d06274b7cf87d643212a433d970b73969016")
> +        (revision "14"))

I'd use revision 0 or 1 to start with.

>    (tree-sitter-grammar
>     "javascript" "JavaScript(JSX)"
> -   "175yrk382n2di0c2xn4gpv8y4n83x1lg4hqn04vabf0yqynlkq67"
> -   "0.20.0"
> -   #:commit "rust-0.20.0"))
> +   "1pk6d9g6a7bzhxmwnvfiycarcgz76wq2rgfqr0xjh7y7swfw5hvw"
> +   (git-version "0.20.0" revision commit)
> +   #:commit commit)))