packaging error on ubuntu

eric@eric-Blade:~/projects/corefx/src$ $msbuild System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj 
Microsoft (R) Build Engine version 14.1.0.0
Copyright (C) Microsoft Corporation. All rights reserved.

Build started 1/7/2016 11:35:31 AM.
The target "ResolveReferences" listed in a BeforeTargets attribute at "/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/FrameworkTargeting.targets (46,7)" does not exist in the project, and will be ignored.
The target "ResolveAssemblyReferences" listed in an AfterTargets attribute at "/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/FrameworkTargeting.targets (89,54)" does not exist in the project, and will be ignored.
The target "ResolveReferences" listed in an AfterTargets attribute at "/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/PackageLibs.targets (158,11)" does not exist in the project, and will be ignored.
Project "/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj" on node 1 (default targets).
_RestoreBuildTools:
Skipping target "_RestoreBuildTools" because all output files are up-to-date with respect to the input files.
GetPkgProjPackageDependencies:
Skipping target "GetPkgProjPackageDependencies" because it has no inputs.
Project "/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj" (1) is building "/home/eric/projects/corefx/src/System.Reflection.Metadata/src/System.Reflection.Metadata.builds" (2) on node 1 (Build target(s)).
Project "/home/eric/projects/corefx/src/System.Reflection.Metadata/src/System.Reflection.Metadata.builds" (2) is building "/home/eric/projects/corefx/src/System.Reflection.Metadata/src/System.Reflection.Metadata.csproj" (3) on node 1 (Build target(s)).
ResolveAssemblyReferences:
  A TargetFramework profile exclusion list will be generated.
ValidatePackageTargetFramework:
Skipping target "ValidatePackageTargetFramework" because all output files are up-to-date with respect to the input files.
CoreResGen:
  No resources are out of date with respect to their source files. Skipping resource generation.
GenerateResourcesSource:
Skipping target "GenerateResourcesSource" because all output files are up-to-date with respect to the input files.
GenerateAssemblyInfo:
Skipping target "GenerateAssemblyInfo" because all output files are up-to-date with respect to the input files.
CoreCompile:
Skipping target "CoreCompile" because all output files are up-to-date with respect to the input files.
OpenSourceSign:
Skipping target "OpenSourceSign" because all output files are up-to-date with respect to the input files.
CopyFilesToOutputDirectory:
  System.Reflection.Metadata -> /home/eric/projects/corefx/bin/AnyOS.AnyCPU.Debug/System.Reflection.Metadata/System.Reflection.Metadata.dll
Done Building Project "/home/eric/projects/corefx/src/System.Reflection.Metadata/src/System.Reflection.Metadata.csproj" (Build target(s)).
Done Building Project "/home/eric/projects/corefx/src/System.Reflection.Metadata/src/System.Reflection.Metadata.builds" (Build target(s)).
Project "/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj" (1) is building "/home/eric/projects/corefx/src/System.Reflection.Metadata/src/System.Reflection.Metadata.builds" (2:2) on node 1 (Build target(s)).
Project "/home/eric/projects/corefx/src/System.Reflection.Metadata/src/System.Reflection.Metadata.builds" (2:2) is building "/home/eric/projects/corefx/src/System.Reflection.Metadata/src/System.Reflection.Metadata.csproj" (3:2) on node 1 (Build target(s)).
ResolveAssemblyReferences:
  A TargetFramework profile exclusion list will be generated.
ValidatePackageTargetFramework:
Skipping target "ValidatePackageTargetFramework" because all output files are up-to-date with respect to the input files.
CoreResGen:
  No resources are out of date with respect to their source files. Skipping resource generation.
GenerateResourcesSource:
Skipping target "GenerateResourcesSource" because all output files are up-to-date with respect to the input files.
GenerateAssemblyInfo:
Skipping target "GenerateAssemblyInfo" because all output files are up-to-date with respect to the input files.
CoreCompile:
Skipping target "CoreCompile" because all output files are up-to-date with respect to the input files.
OpenSourceSign:
Skipping target "OpenSourceSign" because all output files are up-to-date with respect to the input files.
CopyFilesToOutputDirectory:
  System.Reflection.Metadata -> /home/eric/projects/corefx/bin/AnyOS.AnyCPU.Debug/System.Reflection.Metadata/System.Reflection.Metadata.dll
Done Building Project "/home/eric/projects/corefx/src/System.Reflection.Metadata/src/System.Reflection.Metadata.csproj" (Build target(s)).
Done Building Project "/home/eric/projects/corefx/src/System.Reflection.Metadata/src/System.Reflection.Metadata.builds" (Build target(s)).
Project "/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj" (1) is building "/home/eric/projects/corefx/src/System.Reflection.Metadata/src/System.Reflection.Metadata.builds" (2:3) on node 1 (GetFilesToPackage target(s)).
Project "/home/eric/projects/corefx/src/System.Reflection.Metadata/src/System.Reflection.Metadata.builds" (2:3) is building "/home/eric/projects/corefx/src/System.Reflection.Metadata/src/System.Reflection.Metadata.csproj" (3:3) on node 1 (GetFilesToPackage target(s)).
_RestoreBuildTools:
Skipping target "_RestoreBuildTools" because all output files are up-to-date with respect to the input files.
Done Building Project "/home/eric/projects/corefx/src/System.Reflection.Metadata/src/System.Reflection.Metadata.csproj" (GetFilesToPackage target(s)).
Done Building Project "/home/eric/projects/corefx/src/System.Reflection.Metadata/src/System.Reflection.Metadata.builds" (GetFilesToPackage target(s)).
Project "/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj" (1) is building "/home/eric/projects/corefx/src/System.Reflection.Metadata/src/System.Reflection.Metadata.builds" (2:4) on node 1 (GetFilesToPackage target(s)).
Project "/home/eric/projects/corefx/src/System.Reflection.Metadata/src/System.Reflection.Metadata.builds" (2:4) is building "/home/eric/projects/corefx/src/System.Reflection.Metadata/src/System.Reflection.Metadata.csproj" (3:4) on node 1 (GetFilesToPackage target(s)).
_RestoreBuildTools:
Skipping target "_RestoreBuildTools" because all output files are up-to-date with respect to the input files.
Done Building Project "/home/eric/projects/corefx/src/System.Reflection.Metadata/src/System.Reflection.Metadata.csproj" (GetFilesToPackage target(s)).
Done Building Project "/home/eric/projects/corefx/src/System.Reflection.Metadata/src/System.Reflection.Metadata.builds" (GetFilesToPackage target(s)).
AddPlaceholders:
Skipping target "AddPlaceholders" because it has no inputs.
AddPlaceholders:
Skipping target "AddPlaceholders" because it has no inputs.
GenerateNuSpec:
  Skipping generation of .nuspec because contents are identical.
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error : Error when creating nuget package from /home/eric/projects/corefx/bin/pkg/specs/System.Reflection.Metadata.nuspec. System.IO.DirectoryNotFoundException: Directory '/home/eric/projects/corefx/bin/pkg/specs/home/eric/projects/corefx/bin/AnyOS.AnyCPU.Debug/System.Reflection.Metadata' not found. [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at System.IO.Directory.ValidateDirectoryListing (System.String path, System.String searchPattern, System.Boolean& stop) <0x7f2d67557260 + 0x0019c> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at System.IO.Directory.GetFileSystemEntries (System.String path, System.String searchPattern, FileAttributes mask, FileAttributes attrs) <0x7f2d675574a0 + 0x00066> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at System.IO.Directory.GetFiles (System.String path, System.String searchPattern) <0x7f2d67556af0 + 0x00018> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at System.IO.Directory.GetFiles (System.String path, System.String searchPattern, SearchOption searchOption) <0x7f2d67556b10 + 0x00026> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at NuGet.PathResolver.PerformWildcardSearchInternal (System.String basePath, System.String searchPath, Boolean includeEmptyDirectories, System.String& normalizedBasePath) <0x41f8cc90 + 0x00355> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at NuGet.PathResolver.ResolveSearchPattern (System.String basePath, System.String searchPath, System.String targetPath, Boolean includeEmptyDirectories) <0x41f8ca60 + 0x000cb> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at NuGet.PackageBuilder.AddFiles (System.String basePath, System.String source, System.String destination, System.String exclude) <0x41f8c7d0 + 0x00043> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at NuGet.PackageBuilder.PopulateFiles (System.String basePath, IEnumerable`1 files) <0x41f8c670 + 0x0008b> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at NuGet.PackageBuilder.ReadManifest (System.IO.Stream stream, System.String basePath, IPropertyProvider propertyProvider) <0x41f3a130 + 0x0008b> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at NuGet.PackageBuilder..ctor (System.String path, System.String basePath, IPropertyProvider propertyProvider, Boolean includeEmptyDirectories) <0x41f39a70 + 0x0005f> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at NuGet.PackageBuilder..ctor (System.String path, IPropertyProvider propertyProvider, Boolean includeEmptyDirectories) <0x41f39a10 + 0x00047> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at Microsoft.DotNet.Build.Tasks.Packaging.NuGetPack.Execute () <0x41f39030 + 0x0054b> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
Done Building Project "/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj" (default targets) -- FAILED.

Build FAILED.

"/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj" (default target) (1) ->
(CreatePackage target) -> 
  /home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error : Error when creating nuget package from /home/eric/projects/corefx/bin/pkg/specs/System.Reflection.Metadata.nuspec. System.IO.DirectoryNotFoundException: Directory '/home/eric/projects/corefx/bin/pkg/specs/home/eric/projects/corefx/bin/AnyOS.AnyCPU.Debug/System.Reflection.Metadata' not found. [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at System.IO.Directory.ValidateDirectoryListing (System.String path, System.String searchPattern, System.Boolean& stop) <0x7f2d67557260 + 0x0019c> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at System.IO.Directory.GetFileSystemEntries (System.String path, System.String searchPattern, FileAttributes mask, FileAttributes attrs) <0x7f2d675574a0 + 0x00066> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at System.IO.Directory.GetFiles (System.String path, System.String searchPattern) <0x7f2d67556af0 + 0x00018> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at System.IO.Directory.GetFiles (System.String path, System.String searchPattern, SearchOption searchOption) <0x7f2d67556b10 + 0x00026> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at NuGet.PathResolver.PerformWildcardSearchInternal (System.String basePath, System.String searchPath, Boolean includeEmptyDirectories, System.String& normalizedBasePath) <0x41f8cc90 + 0x00355> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at NuGet.PathResolver.ResolveSearchPattern (System.String basePath, System.String searchPath, System.String targetPath, Boolean includeEmptyDirectories) <0x41f8ca60 + 0x000cb> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at NuGet.PackageBuilder.AddFiles (System.String basePath, System.String source, System.String destination, System.String exclude) <0x41f8c7d0 + 0x00043> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at NuGet.PackageBuilder.PopulateFiles (System.String basePath, IEnumerable`1 files) <0x41f8c670 + 0x0008b> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at NuGet.PackageBuilder.ReadManifest (System.IO.Stream stream, System.String basePath, IPropertyProvider propertyProvider) <0x41f3a130 + 0x0008b> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at NuGet.PackageBuilder..ctor (System.String path, System.String basePath, IPropertyProvider propertyProvider, Boolean includeEmptyDirectories) <0x41f39a70 + 0x0005f> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at NuGet.PackageBuilder..ctor (System.String path, IPropertyProvider propertyProvider, Boolean includeEmptyDirectories) <0x41f39a10 + 0x00047> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]
/home/eric/projects/corefx/packages/Microsoft.DotNet.BuildTools.1.0.25-prerelease-00144/lib/Packaging.targets : error :   at Microsoft.DotNet.Build.Tasks.Packaging.NuGetPack.Execute () <0x41f39030 + 0x0054b> in <filename unknown>:0  [/home/eric/projects/corefx/src/System.Reflection.Metadata/pkg/System.Reflection.Metadata.pkgproj]