Hello, I'm a relatively new nix user, and I've found myself with the rather ambitious 'first' project of trying to get a server I rely on packaged within nix, after the janky docker setup I was using to run it decided to break. Using the buildDotnetModule documentation and modelling after other dotnet packages in nixpkgs, I've managed to make some progress, but when I try to build the derivation, I get this for output:

Running phase: unpackPhase
unpacking source archive /nix/store/qnbpclirrsglnhb0wmnbv7jpy3mn1q08-source
source root is source
Running phase: patchPhase
Running phase: updateAutotoolsGnuConfigScriptsPhase
Running phase: configurePhase
Executing dotnetConfigureHook
The command could not be loaded, possibly because:
  * You intended to execute a .NET application:
      The application 'tool' does not exist.
  * You intended to execute a .NET SDK command:
      No .NET SDKs were found.

Download a .NET SDK:
https://aka.ms/dotnet/download

I assume I'm missing something, but no amount of clever googling has gotten me answers as to what a solution would be, and I'm a bit too ignorant of both dotnet's build ecosystem and nix itself to figure it out myself. Hopefully that all came formatted correctly.

I hope so.

  dotnet-sdk = dotnetCorePackages.sdk_8_0;
  dotnet-runtime = dotnetCorePackages.aspnetcore_8_0;

Hey; i've been trying to make a dev environment for jellyfin, and I can't seem to do so(for jellyfin or anything else).
I seem to be running into an error where dotnet cant find the service index:

Unable to load the service index for source https://api.nuget.org/v3/index.json

I have tried to just copy the jellyfin derivation files in nixpkgs, only changing the source to be the current folder, and it seems to still be happening. Is there anything else I need to be doing to set this up?

Running the fetch-deps attribute gets me this for all of the deps:

 Retrying 'FindPackagesByIdAsync' for source 'https://api.nuget.org/v3-flatcontainer/seriloganalyzer/index.json'.
  Request headers must contain only ASCII characters.