Warnings when getting .NET dependencies

Running $(nix-build --attr pkgs.nexus-mods-app.passthru.fetch-deps) on this PR I get a few warnings:

❯ $(nix-build --attr pkgs.nexus-mods-app.passthru.fetch-deps)
An issue was encountered verifying workloads. For more information, run "dotnet workload update".
Cannot find a manifest file.
For a list of locations searched, specify the "-d" option before the tool name.
No tools were restored.
cp: cannot stat '/tmp/deps-nexus-mods-app-8SGCrm/home/.nuget/packages/*': No such file or directory

Are any of these things I should worry about?