dotnet: net10 SDK's `dotnet` raises "NETSDK1226: Prune Package data not found" build failure

[Smaug123]

Nixpkgs version

• Unstable (25.11)

Describe the bug

dotnet fails to restore at least one project after upgrading the SDK to net10: for example, /nix/store/cfqx8mrgv82h8ag1y3gq7gfl0q92hv21-dotnet-sdk-wrapped-10.0.100/bin/dotnet restore in commit 1f2280f36ac229ebc89123980d1fdcf8218423d8 of https://github.com/Smaug123/WoofWare.Incremental fails with:

/nix/store/y2sq06r0f6rz5j83xv93hni5swqla5n1-dotnet-sdk-10.0.100/share/dotnet/sdk/10.0.100/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(66,5): error NETSDK1226: Prune Package data not found .NETCoreApp 10.0 Microsoft.NETCore.App.  To ignore this error, set the AllowMissingPrunePackageData to true. [/Users/patrick/Documents/GitHub/WoofWare.Incremental/WoofWare.Incremental.Test/WoofWare.Incremental.Test.fsproj]

This also affects the passthru fetch-deps. I attached some logs suggesting that some restores worked; I think those are the net9-or-lower projects.

The restore only fails for the net10 TargetFramework (exe or library, I've tried both).

Steps to reproduce

• git clone https://github.com/Smaug123/WoofWare.Incremental && cd WoofWare.Incremental && git checkout 1f2280f36ac229ebc89123980d1fdcf8218423d8
• nix develop --command dotnet restore

(I've only tested this, and only reproduced this, on aarch64-darwin.)

Expected behaviour

The .NET build completes successfully.

Screenshots

No response

Relevant log output

$ nix build .#default.fetch-deps && ./result nix/deps.json && rm result
warning: Git tree '/Users/patrick/Documents/GitHub/WoofWare.Incremental' is dirty
fetching dependencies for WoofWare.Incremental
Running phase: unpackPhase
unpacking source archive /nix/store/sk70xyxsd497wlm03gcka3ci28rnbgb7-6y639q8b9904xyrc9hxm73zvsng9cgs1-source
source root is 6y639q8b9904xyrc9hxm73zvsng9cgs1-source
Running phase: patchPhase
Running phase: configureNuget
The template "NuGet Config" was created successfully.

Processing post-creation actions...



Running phase: updateAutotoolsGnuConfigScriptsPhase
Running phase: configurePhase
Executing dotnetConfigureHook
Tool 'fantomas' (version '7.0.3') was restored. Available commands: fantomas
Tool 'fsharp-analyzers' (version '0.34.1') was restored. Available commands: fsharp-analyzers

Restore was successful.
  Determining projects to restore...
  Restored /private/var/folders/tq/sx8_b6p91nz72q7_kgk1vgp80000gn/T/fetch-deps-WoofWare.Incremental.vwyEJ5/6y639q8b9904xyrc9hxm73zvsng9cgs1-source/WoofWare.Incremental/WoofWare.Incremental.fsproj (in 623 ms).
  Determining projects to restore...
  Restored /private/var/folders/tq/sx8_b6p91nz72q7_kgk1vgp80000gn/T/fetch-deps-WoofWare.Incremental.vwyEJ5/6y639q8b9904xyrc9hxm73zvsng9cgs1-source/WoofWare.Incremental/WoofWare.Incremental.fsproj (in 556 ms).
  Determining projects to restore...
  Restored /private/var/folders/tq/sx8_b6p91nz72q7_kgk1vgp80000gn/T/fetch-deps-WoofWare.Incremental.vwyEJ5/6y639q8b9904xyrc9hxm73zvsng9cgs1-source/WoofWare.Incremental/WoofWare.Incremental.fsproj (in 587 ms).
  Determining projects to restore...
  Restored /private/var/folders/tq/sx8_b6p91nz72q7_kgk1vgp80000gn/T/fetch-deps-WoofWare.Incremental.vwyEJ5/6y639q8b9904xyrc9hxm73zvsng9cgs1-source/WoofWare.Incremental/WoofWare.Incremental.fsproj (in 116 ms).
  Determining projects to restore...
/nix/store/y2sq06r0f6rz5j83xv93hni5swqla5n1-dotnet-sdk-10.0.100/share/dotnet/sdk/10.0.100/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(66,5): error NETSDK1226: Prune Package data not found .NETCoreApp 10.0 Microsoft.NETCore.App.  To ignore this error, set the AllowMissingPrunePackageData to true. [/private/var/folders/tq/sx8_b6p91nz72q7_kgk1vgp80000gn/T/fetch-deps-WoofWare.Incremental.vwyEJ5/6y639q8b9904xyrc9hxm73zvsng9cgs1-source/WoofWare.Incremental.Test/WoofWare.Incremental.Test.fsproj]

Additional context

This has happened on all the prereleases I tried, but an issue of this shape was fixed in the SDK so I didn't report it earlier in case it was in the SDK.

#461246 was the PR that added the stable net10 release, but I think the issue was present in earlier release candidates too.

System metadata

$ nix-shell -p nix-info --run "nix-info -m"
 - system: `"aarch64-darwin"`
 - host os: `Darwin 24.6.0, macOS 15.6.1`
 - multi-user?: `yes`
 - sandbox: `no`
 - version: `nix-env (Nix) 2.31.2`
 - channels(root): `"nixpkgs"`
 - nixpkgs: `/nix/store/7yzwp99zg2qsv3pwf3b4jariqxfid8n7-source`

Notify maintainers

@kuznero @mdarocha @corngood

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[Smaug123]

Setting <AllowMissingPrunePackageData>true</AllowMissingPrunePackageData> in the net10 fsproj does cause the build to succeed.

[hikdul]

All rigth for now the temporally solution is use

  <PropertyGroup>
 	 <AllowMissingPrunePackageData>true</AllowMissingPrunePackageData>
  </PropertyGroup>

thanks...

[MrScottyTay]

any way to get this to work without allowing missing prune package data?

[corngood]

Can anyone come up with a minimal repro for this?

[Smaug123]

Got it: in my experimentation, the problem is present exactly when you set <NetCoreTargetingPackRoot>[UNDEFINED]</NetCoreTargetingPackRoot> in a net10 project. This is the minimum fsproj that demonstrates the problem:

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>net10.0</TargetFramework>
    <NetCoreTargetingPackRoot>[UNDEFINED]</NetCoreTargetingPackRoot>
  </PropertyGroup>
</Project>

Here's the flake.nix that defined the devshell:

{
  description = "Jane Street's Incremental, but ported to F#";

  inputs = {
    flake-utils.url = "github:numtide/flake-utils";
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
  };

  outputs = {
    nixpkgs,
    flake-utils,
    ...
  }:
    flake-utils.lib.eachDefaultSystem (system: let
      pkgs = import nixpkgs {
        inherit system;
      };
      pname = "WoofWare.Incremental";
      dotnet-sdk = pkgs.dotnetCorePackages.sdk_10_0;
      dotnet-runtime = pkgs.dotnetCorePackages.runtime_10_0;
      version = "0.1";
    in {
      packages =
      {
        default = pkgs.buildDotnetModule {
          inherit pname version dotnet-sdk dotnet-runtime;
          name = "WoofWare.Incremental";
          src = ./.;
          projectFile = "./WoofWare.Incremental/WoofWare.Incremental.fsproj";
          nugetDeps = ./nix/deps.json; # `nix build .#default.fetch-deps && ./result nix/deps.json`
          doCheck = true;
        };
      };
      devShell = pkgs.mkShell {
        buildInputs = [dotnet-sdk];
      };
    });
}

flake.lock:

{
  "nodes": {
    "flake-utils": {
      "inputs": {
        "systems": "systems"
      },
      "locked": {
        "lastModified": 1731533236,
        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
        "owner": "numtide",
        "repo": "flake-utils",
        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
        "type": "github"
      },
      "original": {
        "owner": "numtide",
        "repo": "flake-utils",
        "type": "github"
      }
    },
    "nixpkgs": {
      "locked": {
        "lastModified": 1773840656,
        "narHash": "sha256-9tpvMGFteZnd3gRQZFlRCohVpqooygFuy9yjuyRL2C0=",
        "owner": "NixOS",
        "repo": "nixpkgs",
        "rev": "9cf7092bdd603554bd8b63c216e8943cf9b12512",
        "type": "github"
      },
      "original": {
        "owner": "NixOS",
        "ref": "nixpkgs-unstable",
        "repo": "nixpkgs",
        "type": "github"
      }
    },
    "root": {
      "inputs": {
        "flake-utils": "flake-utils",
        "nixpkgs": "nixpkgs"
      }
    },
    "systems": {
      "locked": {
        "lastModified": 1681028828,
        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
        "owner": "nix-systems",
        "repo": "default",
        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
        "type": "github"
      },
      "original": {
        "owner": "nix-systems",
        "repo": "default",
        "type": "github"
      }
    }
  },
  "root": "root",
  "version": 7
}

Why on earth I have that set everywhere, I have no idea; it's a piece of cargo-culted copypasta. I see dotnet/sdk#24338 refers to it as a hack.