Oh I forgot to respond to the rest of the post, sorry.

If so, you need to make sure the dependent projects reference the dependencies with PackageReference, and you'll need to make sure the dependencies are built with packNupkg = true, and included in `buildInputs of the dependent derivation.

The derivations for kaligraphy and kanvas both have buildInputs = [ komponent ];, and all three have packNupkg = true;, though I'm not 100% sure if they all have PackageReference in the original project, I'll have to look back at that in a bit. I'm assuming that they are correctly doing that, though.

  <ItemGroup>
    <PackageReference Include="Imgui.Forms" Version="1.5.11" />
    <PackageReference Include="Serilog.Sinks.File" Version="6.0.0" />
    <PackageReference Include="System.Drawing.Common" Version="5.0.3" />
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include="..\..\lib\Konnect.Contract\Konnect.Contract.csproj" />
    <ProjectReference Include="..\..\lib\Konnect\Konnect.csproj" />
    <ProjectReference Include="..\..\lib\Kryptography.Contract\Kryptography.Contract.csproj" />
    <ProjectReference Include="..\..\lib\Kryptography\Kryptography.csproj" />
  </ItemGroup>

This project doesn't seem to use PackageReference for internal stuff, which isn't really surprising. I think you should just make it a single derivation and build the one project you actually want. Kuriimu2.ImGui.csproj?

I've got a couple of .NET 6 EOL PRs if anyone has time to review

• https://github.com/NixOS/nixpkgs/pull/436377
• https://github.com/NixOS/nixpkgs/pull/436407

Yeah, sadly it seems to have failed again

./prep-source-build.sh: line 363:  6047 Segmentation fault         (core dumped) "$dotnetSdk/dotnet" build "$REPO_ROOT/eng/init-detect-binaries.proj" "/p:BinariesMode=Clean" "/p:AllowedBinariesFile=$REPO_ROOT/eng/allowed-sb-binaries.txt" "/p:BinariesPackagesDir=$psbDir" "/bl:artifacts/log/prep-remove-binaries.binlog" "/fileLoggerParameters:LogFile=artifacts/log/prep-remove-binaries.log" "${positional_args[@]}"

I had a go at reproducing this locally, but no luck so far. A core dump would be nice.

$  nix log /nix/store/zcnfwxnbwss3anlqj9wld8mb0w0lp5by-dotnet-vmr-10.0.0-preview.7.drv | rg -i "Phase completed"
unpackPhase completed in 55 seconds
configurePhase completed in 36 seconds
buildPhase completed in 1 hours 20 minutes 17 seconds
installPhase completed in 48 seconds
fixupPhase completed in 3 minutes 21 seconds

It only took just under an hour and a half this time, nice!

In reply to @whovian9369:matrix.org
I went back to that Kuriimu2 project that I was working on, and I can't for the life of me figure out how to get it building so far.
Originally I tried doing it as different packages that got provided via the Flake, but I instead attempted adding the various local dependencies via a projectFile list is just throwing errors on fetch-deps again since it wants NuGet binaries for most of them that don't actually exist yet since this is still just the dependency stage...
(The error given is just error NU1101: Unable to find package Komponent. No packages exist with this id in source(s): nuget, _nix)

{
  projectFile = [
    ## Various dependencies that are required for the main project.
    # "Komponent" appears to be module everything else needs.
    "src/lib/Komponent/Komponent.csproj"
    "src/lib/Komponent.Contract/Komponent.Contract.csproj"
    # "Kaligraphy" requires "Komponent".
    "src/lib/Kaligraphy/Kaligraphy.csproj"
    "src/lib/Kaligraphy.Contract/Kaligraphy.Contract.csproj"
    # "Kanvas" requires "Komponent".
    "src/lib/Kanvas/Kanvas.csproj"
    "src/lib/Kanvas.Contract/Kanvas.Contract.csproj"
    # "Kompression" requires "Komponent".
    "src/lib/Kompression/Kompression.csproj"
    "src/lib/Kompression.Contract/Kompression.Contract.csproj"
    # "Kryptography" requires "Komponent".
    "src/lib/Kryptography/Kryptography.csproj"
    "src/lib/Kryptography.Contract/Kryptography.Contract.csproj"
    # "Konnect" requires "Kaligraphy", "Kanvas", and "Kompression".
    "src/lib/Konnect/Konnect.csproj"
    "src/lib/Konnect.Contract/Konnect.Contract.csproj"

    # # Project itself
    "src/ui/Kuriimu2.ImGui/Kuriimu2.ImGui.csproj"
    # "src/ui/Kuriimu2.Cmd/Kuriimu2.Cmd.csproj"
      # Set to target "netcoreapp3.1"?!
  ];

}

I'd say this is the important section, which as I explained above, doesn't actually fix my fetch-deps woes.