Unable to build custom iosevka with bold

Hi all, I currently have these Iosevka custom build plans; but I am unable to build with a bold font and any other font weight. I can build the regular font and italic font just fine, but whenever I add the bold font weight the builder just errors out and crashes, and I’m unable to find any issue with the logs. I started by adapting this flake just to use my build plans.

Output of nix-shell -p nix-info --run "nix-info -m":

- system: `"x86_64-linux"`
 - host os: `Linux, Ubuntu, 22.04.3 LTS (Jammy Jellyfish), nobuild`
 - multi-user?: `no`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.13.2`
 - channels(jhilker): `"home-manager, nixpkgs"`
 - nixpkgs: `/home/jhilker/.nix-defexpr/channels/nixpkgs`

Any ideas what might be going on here? I’m still pretty new to Nix.

Update: It was just OOMing.