`error: value is null while a set was expected` on update

[srid]

I updated comma to the latest master branch, followed by running comma --updated (because it asked me to), which lead to:

❯ comma --update
Updating nix-index database, takes around 5 minutes.
+ querying available packages
error: querying available packages failed
caused by: nix-env failed with error: nix-env failed with exit code 1:
error: value is null while a set was expected

       at /nix/store/x3b24m65sn4r8ciyza1cbwr431320aal-nixpkgs/nixpkgs/pkgs/development/r-modules/default.nix:514:19:

          513|     pbdZMQ = lib.optionals stdenv.isDarwin [ pkgs.darwin.binutils ];
          514|     bigmemory = [ pkgs.libuuid.dev ];
             |                   ^
          515|     clustermq = [  pkgs.pkg-config ];
(use '--show-trace' to show detailed location information)

[srid]

Cause: nix-community/nix-index#195

[Artturin]

Not our issue, report in nixpkgs