please regenerate the nodejs package set using the generate.sh script in the same directory. Otherwise the package won't be available in the package set.

I can add it in #50003
as well.

I could not get nix-build -A nodePackages.fkill to run; it couldn't find the package.

I was able to do it last time, however, but I used a flag that I have since forgotten.

I assume the problem is with my setup (and nix-build knowing to use the current directory for nixpkgs), not with the package.

I could not get nix-build -A nodePackages.fkill to run; it couldn't find the package.

As far as I can tell you only added a part of the changed node-packages.nix, right? Because at the bottom of the file you have buildNodePackage statements that actually define the package build and they appear to be missing.

I recommend to simply commit the full change (although this makes the patch fairly big, I know), but then you can be sure that you have a working package set of NodeJS packages. Otherwise it can't be guaranteed that all definitions are compatible with each other.

That must be the case, thank you. I hoped to save time, but should followed the instructions directly.

The commit I just made includes the full changes of generate.sh.

$ nix-build . -A nodePackages.fkill-cli
/nix/store/9k22xc23pf0r0jb9d1v3mgm2azq00fmb-node-fkill-cli-5.2.0

$ ls /nix/store/9k22xc23pf0r0jb9d1v3mgm2azq00fmb-node-fkill-cli-5.2.0/bin
fkill

$ /nix/store/9k22xc23pf0r0jb9d1v3mgm2azq00fmb-node-fkill-cli-5.2.0/bin/fkill
[fkill runs, working as intended as far as I can tell]

Thank you for the patience.