I'm not sure why, but I can't seem to find the dotnet sdk matching those build IDs:

$ eu-unstrip -n --core core.dotnet.1000.3a20fb14c4624604a43db731020ae596.1258979.1759762428000000
0x555555554000+0x14000 241026d804eadbfa123e6fd0aa66a3b313a86f1d@0x5555555543b8 - - /home/waldemar/source/dotnet_10_nixbuild/dotnet-10.0.100-rc.1.25451.107/.dotnet/dotnet
0x7fffe71b4000+0x32000 cb0989ffc047e7f9a021f8f8fa19ffc61fc6b288@0x7fffe71b4248 - - /home/waldemar/source/dotnet_10_nixbuild/dotnet-10.0.100-rc.1.25451.107/.dotnet/shared/Microsoft.NETCore.App/10.0.0-rc.1.25451.107/libSystem.Security.Cryptography.Native.OpenSsl.so
0x7fffecc00000+0x37f000 f053ad10559276e9e51aecb0268b154dcc9957aa@0x7fffecc00280 - - /home/waldemar/source/dotnet_10_nixbuild/dotnet-10.0.100-rc.1.25451.107/.dotnet/shared/Microsoft.NETCore.App/10.0.0-rc.1.25451.107/libclrjit.so
0x7fffeea6d000+0x1b000 e868f3a81abcb6f81ab996e9e74a0fdae91652ec@0x7fffeea6d280 - - /home/waldemar/source/dotnet_10_nixbuild/dotnet-10.0.100-rc.1.25451.107/.dotnet/shared/Microsoft.NETCore.App/10.0.0-rc.1.25451.107/libSystem.Native.so
0x7ffff7000000+0x740000 51d41b5dd39b0caf8564e51f44a95a595d0f11b8@0x7ffff7000280 - - /home/waldemar/source/dotnet_10_nixbuild/dotnet-10.0.100-rc.1.25451.107/.dotnet/shared/Microsoft.NETCore.App/10.0.0-rc.1.25451.107/libcoreclr.so
0x7ffff7a81000+0xe3000 0af03026e75a10f4e44e090b73aad54dbcc5f06e@0x7ffff7a81248 - - /home/waldemar/source/dotnet_10_nixbuild/dotnet-10.0.100-rc.1.25451.107/.dotnet/shared/Microsoft.NETCore.App/10.0.0-rc.1.25451.107/libcoreclrtraceptprovider.so
0x7ffff7b64000+0x4d000 f741919d1a0311adb007ae43413fa57e15928980@0x7ffff7b64280 - - /home/waldemar/source/dotnet_10_nixbuild/dotnet-10.0.100-rc.1.25451.107/.dotnet/shared/Microsoft.NETCore.App/10.0.0-rc.1.25451.107/libhostpolicy.so
0x7ffff7bb1000+0x4f000 cceb4825e7102b503944bda98334109727755b5d@0x7ffff7bb1280 - - /home/waldemar/source/dotnet_10_nixbuild/dotnet-10.0.100-rc.1.25451.107/.dotnet/host/fxr/10.0.0-rc.1.25451.107/libhostfxr.so
[...]

If I unpack and configure dotnet with nix develop nixpkgs/7df7ff7d8e00218376575f0acdcc5d66741351ee#dotnetCorePackages.dotnet_10.vmr, I get:

$ file .dotnet/dotnet
tmp/dotnet-10.0.100-rc.1.25451.107/.dotnet/dotnet: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /nix/store/776irwlgfb65a782cxmyk61pck460fs9-glibc-2.40-66/lib/ld-linux-x86-64.so.2, BuildID[sha1]=8cfe346da5b77627ebe747a8085cc2f606b4f074, for GNU/Linux 3.10.0, not stripped

I even tried stage0.vmr in case yours was crashing there, but those build IDs don't match either.

That gave me:

#0  0x00007fbed0f69113 in LinearScan::RegisterSelection::try_SPILL_COST (this=0x7fbe542d0b20) at /build/dotnet-10.0.100-rc.1.25451.107/src/runtime/src/coreclr/jit/lsra.cpp:13103
#1  0x00007fbe542cee18 in ?? ()
#2  0x00007fbe544df418 in ?? ()
#3  0x4076800000000009 in ?? ()
#4  0x0000000000000000 in ?? ()

which led me to https://github.com/dotnet/runtime/issues/119070

Hey gang, I'm trying to build https://github.com/aaru-dps/Aaru/releases/tag/v6.0.0-alpha.12 from source (e2d70ba327dfc5ab67d068389c0b2e6049f76a87) and keep getting the following issue. The issue does not seem to appear with the latest git commit (5e8aece987d799e51e970bd170c28e2bd1ebf374) -- Anyone have any ideas on where to go from here?

CSC : error PH2075: AssemblyVersion has changed. Actual: 6.0.0.12 Expected: 1.0.0.0 [/build/source/Aaru.Logging/Aaru.Logging.csproj]
CSC : error PH2075: AssemblyVersion has changed. Actual: 6.0.0.12 Expected: 1.0.0.0 [/build/source/Aaru.Localization/Aaru.Localization.csproj]

I'm using nixpkgs for years now, and dotnet for the first time. I need to package a web service somepkg that a third party offers on their own nuget server nuget.thirdparty.com/somepkg/nuget. I can't figure out how to properly override buildDotnetGlobalTool (I guess) to accept the custom nuget url. I'm trying something like this:

buildDotnetGlobalTool.override ({
  fetchNupkg = dotnetCorePackages.fetchNupkg.override {
    url = "..."

But that seems to be wrong:

error: function 'anonymous lambda' called with unexpected argument 'url'
       at /nix/store/jbjpzwqzf0vq989s6y302jy1dff4z321-source/pkgs/build-support/dotnet/fetch-nupkg/default.nix:1:1:

Is there a standard way to do this? (Or else I probably need to dig deep into how dotnet is implemented in nixpkgs?)

I managed something like this:

let
  pname = "IBPkernelSimplifiedHS";
  version = "v1";
  customNugetServer = "https://nuget.thirdparty.com/somepkg/nuget";
  url = "${customNugetServer}/${pname}/${version}";
in
dotnetCorePackages.buildDotnetGlobalTool.override {
  fetchNupkg = args: dotnetCorePackages.fetchNupkg (args // {
    inherit url;
  });
} {
  inherit pname version;
}

And it actually attempts to download from the third party server 🎉 but the URL schema is still wrong. I'm not sure what the standard url schema would be in this case.