Package 'Paket' is referenced with multiple versions. Use NuGetPackageResolver and SetToolPath about nuke

[PascalSenn]

i run into the same issue.

I believe the problem is in this bit:

nuke/source/Nuke.Tooling/NuGetPackageResolver.cs

Lines 200 to 219 in b94f4c1

	var packages = packagesDirectoryInfo
	.GetDirectories(packageId)
	.SelectMany(x => x.GetDirectories())
	.SelectMany(x => x.GetFiles($"{packageId}*.nupkg"))
	.Concat(packagesDirectoryInfo
	.GetDirectories($"{packageId}*")
	.SelectMany(x => x.GetFiles($"{packageId}*.nupkg")))
	.Where(x => x.Name.StartsWithOrdinalIgnoreCase(packageId))
	.Select(x => x.FullName);
	var candidatePackages = packages.Select(x => new InstalledPackage(x))
	// packages can contain false positives due to present/missing version specification
	.Where(x => x.Id.EqualsOrdinalIgnoreCase(packageId))
	.Where(x => !x.Version.IsPrerelease || !includePrereleases.HasValue || includePrereleases.Value)
	.OrderByDescending(x => x.Version)
	.ToList();
	return versionRange == null
	? candidatePackages.FirstOrDefault()
	: candidatePackages.SingleOrDefault(x => x.Version == versionRange.FindBestMatch(candidatePackages.Select(y => y.Version)));

the discovered packages are

[0] = {string} "/Users/p/.nuget/packages/barista/1.0.0-preview.16/barista.1.0.0-preview.16.nupkg"
[1] = {string} "/Users/p/.nuget/packages/barista/7.10.1/barista.7.10.1.nupkg"
[2] = {string} "/Users/p/.nuget/packages/barista/7.10.1/Barista.nupkg"
[3] = {string} "/Users/p/.nuget/packages/barista/7.3.5/barista.7.3.5.nupkg"
[4] = {string} "/Users/p/.nuget/packages/barista/8.0.0/barista.8.0.0.nupkg"
[5] = {string} "/Users/p/.nuget/packages/barista/8.0.0/Barista.nupkg"
[6] = {string} "/Users/p/.nuget/packages/barista/1.0.0-preview.8/barista.1.0.0-preview.8.nupkg"
[7] = {string} "/Users/p/.nuget/packages/barista/1.4.2/barista.1.4.2.nupkg"
[8] = {string} "/Users/p/.nuget/packages/barista/1.4.4/barista.1.4.4.nupkg"
[9] = {string} "/Users/p/.nuget/packages/barista/1.0.0-preview.25/barista.1.0.0-preview.25.nupkg"

So it discovered the .net 8 one twice:

[4] = {string} "/Users/p/.nuget/packages/barista/8.0.0/barista.8.0.0.nupkg"
[5] = {string} "/Users/p/.nuget/packages/barista/8.0.0/Barista.nupkg"

Which leads to the following candidatePackages:

[0] = {NuGetPackageResolver.InstalledPackage} Barista.8.0.0
[1] = {NuGetPackageResolver.InstalledPackage} Barista.8.0.0
[2] = {NuGetPackageResolver.InstalledPackage} Barista.7.10.1
[3] = {NuGetPackageResolver.InstalledPackage} Barista.7.10.1
[4] = {NuGetPackageResolver.InstalledPackage} Barista.7.3.5
[5] = {NuGetPackageResolver.InstalledPackage} Barista.1.4.4
[6] = {NuGetPackageResolver.InstalledPackage} Barista.1.4.2
[7] = {NuGetPackageResolver.InstalledPackage} Barista.1.0.0-preview.25
[8] = {NuGetPackageResolver.InstalledPackage} Barista.1.0.0-preview.16
[9] = {NuGetPackageResolver.InstalledPackage} Barista.1.0.0-preview.8

which then leads to the execption here, because there are two canidates that match:

nuke/source/Nuke.Tooling/NuGetPackageResolver.cs

Line 219 in b94f4c1

: candidatePackages.SingleOrDefault(x => x.Version == versionRange.FindBestMatch(candidatePackages.Select(y => y.Version)));

@matkoch would just switching to FirstOrDefault there be an option?

[matkoch]

Sounds more like a bug in Paket.

[mkay-sh]

For me it looks like the two nupkg files in the global packages folder are created for all dotnet tools I install. For example in dotnet-ef there is a dotnet-ef.8.0.0.nupkg and a dotnet.nupkg file as well. Maybe there are some changes in the handling of dotnet tools with the new sdk?