[build] Share provisioned .NET SDK across worktrees

Configuration.props

@@ -150,6 +150,8 @@
     <XAPackagesDir Condition=" '$(XAPackagesDir)' == '' And '$(NUGET_PACKAGES)' != ''">$(NUGET_PACKAGES)</XAPackagesDir>
     <XAPackagesDir Condition=" '$(XAPackagesDir)' == '' And '$(HostOS)' == 'Windows'">$(userprofile)\.nuget\packages</XAPackagesDir>
     <XAPackagesDir Condition=" '$(XAPackagesDir)' == '' And '$(HostOS)' != 'Windows'">$(HOME)/.nuget/packages</XAPackagesDir>
+    <_DotNetWorkloadEnvironment Condition=" '$(_DotNetUsingSharedSdk)' == 'true' ">DOTNET_CLI_HOME=$(_DotNetWorkloadUserHome);DOTNETSDK_WORKLOAD_MANIFEST_ROOTS=$(_DotNetWorkloadManifestRoot);DOTNETSDK_WORKLOAD_PACK_ROOTS=$(_DotNetWorkloadPackRoot)</_DotNetWorkloadEnvironment>
+    <_DotNetBuildEnvironment Condition=" '$(_DotNetUsingSharedSdk)' == 'true' ">$(_DotNetWorkloadEnvironment);NUGET_PACKAGES=$([MSBuild]::EnsureTrailingSlash('$(XAPackagesDir)'))</_DotNetBuildEnvironment>
     <PathSeparator>$([System.IO.Path]::PathSeparator)</PathSeparator>
     <_TestsAotName Condition=" '$(AotAssemblies)' == 'true' ">-Aot</_TestsAotName>
     <_TestsProfiledAotName Condition=" '$(AndroidEnableProfiledAot)' == 'true' ">-Profiled</_TestsProfiledAotName>

Directory.Build.props

@@ -16,9 +16,25 @@
     <TestOutputDirectory>$(MSBuildThisFileDirectory)bin\Test$(Configuration)\</TestOutputDirectory>
     <BootstrapTasksAssembly>$(BootstrapOutputDirectory)$(DotNetStableTargetFramework)\Xamarin.Android.Tools.BootstrapTasks.dll</BootstrapTasksAssembly>
     <PrepTasksAssembly>$(BootstrapOutputDirectory)$(DotNetStableTargetFramework)\xa-prep-tasks.dll</PrepTasksAssembly>
+    <_DotNetInstallLocationFile>$(BuildOutputDirectory)dotnet-install-location.txt</_DotNetInstallLocationFile>
+    <_DotNetInstallLocation Condition=" '$(TF_BUILD)' == '' and '$(GITHUB_ACTIONS)' == '' and '$(CI)' == '' and Exists('$(_DotNetInstallLocationFile)') ">$([System.IO.File]::ReadAllText('$(_DotNetInstallLocationFile)').Trim())</_DotNetInstallLocation>
+    <_DotNetSharedInstallBase Condition=" '$(XA_DOTNET_SHARED_INSTALL_BASE)' != '' and '$(TF_BUILD)' == '' and '$(GITHUB_ACTIONS)' == '' and '$(CI)' == '' ">$([System.IO.Path]::Combine('$(MSBuildThisFileDirectory)', '$(XA_DOTNET_SHARED_INSTALL_BASE)'))</_DotNetSharedInstallBase>
+    <_DotNetSharedInstallPath Condition=" '$(_DotNetInstallLocation)' != '' and Exists('$(_DotNetInstallLocation)sdk\$(MicrosoftNETSdkPackageVersion)') ">$(_DotNetInstallLocation)</_DotNetSharedInstallPath>
+    <_DotNetSharedInstallPath Condition=" '$(_DotNetSharedInstallPath)' == '' and '$(_DotNetSharedInstallBase)' != '' ">$(_DotNetSharedInstallBase)\$(MicrosoftNETSdkPackageVersion)</_DotNetSharedInstallPath>
+    <_DotNetUsingSharedSdk Condition=" '$(_DotNetSharedInstallPath)' != '' ">true</_DotNetUsingSharedSdk>
+    <DotNetPreviewPath Condition=" '$(DotNetPreviewPath)' == '' and '$(_DotNetSharedInstallPath)' != '' ">$([MSBuild]::EnsureTrailingSlash('$(_DotNetSharedInstallPath)'))</DotNetPreviewPath>
     <DotNetPreviewPath Condition=" '$(DotNetPreviewPath)' == '' ">$(BuildOutputDirectory)dotnet\</DotNetPreviewPath>
-    <DotNetPreviewTool Condition=" '$(DotNetPreviewTool)' == '' and Exists('$(DotNetPreviewPath)') ">$(DotNetPreviewPath)dotnet</DotNetPreviewTool>
+    <DotNetPreviewTool Condition=" '$(DotNetPreviewTool)' == '' and (Exists('$(DotNetPreviewPath)dotnet') or Exists('$(DotNetPreviewPath)dotnet.exe')) ">$(DotNetPreviewPath)dotnet</DotNetPreviewTool>
     <DotNetPreviewTool Condition=" '$(DotNetPreviewTool)' == '' ">dotnet</DotNetPreviewTool>
+    <_DotNetWorkloadPackRoot Condition=" '$(_DotNetUsingSharedSdk)' == 'true' ">$(BuildOutputDirectory)lib\</_DotNetWorkloadPackRoot>
+    <_DotNetWorkloadPackRoot Condition=" '$(_DotNetWorkloadPackRoot)' == '' ">$(DotNetPreviewPath)</_DotNetWorkloadPackRoot>
+    <_DotNetWorkloadManifestRoot Condition=" '$(_DotNetUsingSharedSdk)' == 'true' ">$(_DotNetWorkloadPackRoot)sdk-manifests\</_DotNetWorkloadManifestRoot>
+    <_DotNetWorkloadManifestRoot Condition=" '$(_DotNetWorkloadManifestRoot)' == '' ">$(DotNetPreviewPath)sdk-manifests\</_DotNetWorkloadManifestRoot>
+    <_DotNetWorkloadUserHome Condition=" '$(_DotNetUsingSharedSdk)' == 'true' ">$(BuildOutputDirectory)dotnet-home\</_DotNetWorkloadUserHome>
+    <_DotNetWorkloadUserProfileRoot Condition=" '$(_DotNetUsingSharedSdk)' == 'true' ">$(_DotNetWorkloadUserHome).dotnet\</_DotNetWorkloadUserProfileRoot>
+    <_DotNetWorkloadUserProfileRoot Condition=" '$(_DotNetWorkloadUserProfileRoot)' == '' ">$(DotNetPreviewPath)</_DotNetWorkloadUserProfileRoot>
+    <_DotNetWorkloadUserManifestRoot>$(_DotNetWorkloadUserProfileRoot)sdk-manifests\</_DotNetWorkloadUserManifestRoot>
+    <_DotNetWorkloadUserPackRoot>$(_DotNetWorkloadUserProfileRoot)packs\</_DotNetWorkloadUserPackRoot>
     <!-- Copy PackageReference content to OutputDir for our build tasks, tests, and installer creation logic. This no longer happens by default in short-form projects. -->
     <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
     <!-- Ensure reference assemblies copied to bin -->

Documentation/building/unix/instructions.md

@@ -58,6 +58,21 @@ on Windows, many of the concepts should still apply:
 `make prepare` provisions a specific build of .NET to
 `bin/$(Configuration)/dotnet`.
 
+To share the provisioned SDK between multiple worktrees, set
+`XA_DOTNET_SHARED_INSTALL_BASE` to a common base directory before running
+`make prepare`:
+
+    $ export XA_DOTNET_SHARED_INSTALL_BASE="$HOME/android-dotnet-sdk"
+    $ make prepare
+
+The SDK will be installed under
+`$XA_DOTNET_SHARED_INSTALL_BASE/<sdk-version>`, shared by Debug and Release
+builds. The shared SDK is treated as read-only after provisioning; workload
+packs, manifests, and installation state remain under `bin/$(Configuration)`.
+The override is ignored when `TF_BUILD`, `GITHUB_ACTIONS`, or `CI` is set, so
+CI builds and local builds without `XA_DOTNET_SHARED_INSTALL_BASE` continue to
+use `bin/$(Configuration)/dotnet`.
+
 Once `make all` or `make jenkins` have completed, your local
 `bin/$(Configuration)/lib/packs` directory will be populated with a
 local Android "workload" in `Microsoft.Android.Sdk.$(HostOS)` matching
@@ -78,8 +93,8 @@ Build the project with:
 
     $ ./dotnet-local.sh build foo.csproj
 
-Using the `dotnet-local` script will execute the `dotnet` provisioned in
-`bin/$(Configuration)/dotnet` and will use the locally built binaries.
+Using the `dotnet-local` script will execute the provisioned `dotnet` and
+will use the locally built binaries.
 
 See the [One .NET Documentation](../../guides/OneDotNet.md) for further details.
 

Documentation/building/windows/instructions.md

@@ -91,8 +91,23 @@ Or in powershell:
 
     > dotnet-local.cmd build foo.csproj
 
-Using the `dotnet-local` script will execute the `dotnet` provisioned in
-`bin\$(Configuration)\dotnet` and will use the locally built binaries.
+Using the `dotnet-local` script will execute the provisioned `dotnet` and
+will use the locally built binaries.
+
+To share the provisioned SDK between multiple worktrees, set
+`XA_DOTNET_SHARED_INSTALL_BASE` to a common base directory before running the
+`Prepare` target:
+
+    $env:XA_DOTNET_SHARED_INSTALL_BASE = Join-Path $HOME 'android-dotnet-sdk'
+    dotnet msbuild Xamarin.Android.slnx -t:Prepare
+
+The SDK will be installed under
+`$env:XA_DOTNET_SHARED_INSTALL_BASE\<sdk-version>`, shared by Debug and Release
+builds. The shared SDK is treated as read-only after provisioning; workload
+packs, manifests, and installation state remain under `bin\$(Configuration)`.
+The override is ignored when `TF_BUILD`, `GITHUB_ACTIONS`, or `CI` is set, so
+CI builds and local builds without `XA_DOTNET_SHARED_INSTALL_BASE` continue to
+use `bin\$(Configuration)\dotnet`.
 
 See the [One .NET Documentation](../../guides/OneDotNet.md) for further details.
 

build-tools/create-packs/ConfigureLocalWorkload.targets

@@ -95,6 +95,8 @@
       <_LocalSdkManifestsFolder>$(BuildOutputDirectory)lib\sdk-manifests\$(_LocalSdkFeatureBand)\</_LocalSdkManifestsFolder>
       <_LocalAndroidManifestFolder>$(_LocalSdkManifestsFolder)microsoft.net.sdk.android\$(AndroidPackVersionLong)\</_LocalAndroidManifestFolder>
       <_EmptyWorkloadDir>$(_LocalSdkManifestsFolder)android.deps.workload\0.0.1\</_EmptyWorkloadDir>
+      <_InstallManifestEnvironment Condition=" '$(_DotNetUsingSharedSdk)' == 'true' ">$(_DotNetBuildEnvironment)</_InstallManifestEnvironment>
+      <_InstallManifestEnvironment Condition=" '$(_InstallManifestEnvironment)' == '' ">DOTNETSDK_WORKLOAD_MANIFEST_ROOTS=$(BuildOutputDirectory)lib\sdk-manifests</_InstallManifestEnvironment>
     </PropertyGroup>
 
     <MakeDir Directories="$(_LocalAndroidManifestFolder)" />
@@ -128,7 +130,7 @@
     />
     <Exec
         Command="&quot;$(DotNetPreviewTool)&quot; workload install android-deps --configfile &quot;$(XamarinAndroidSourcePath)NuGet.config&quot; --skip-manifest-update --skip-sign-check --verbosity diag"
-        EnvironmentVariables="DOTNETSDK_WORKLOAD_MANIFEST_ROOTS=$(BuildOutputDirectory)lib\sdk-manifests"
+        EnvironmentVariables="$(_InstallManifestEnvironment)"
         WorkingDirectory="$(XamarinAndroidSourcePath)"
     />
      <RemoveDir Directories="$(_EmptyWorkloadDir)" />

build-tools/create-packs/Directory.Build.targets

@@ -88,7 +88,7 @@
       <_WLManifest Include="$(XamarinAndroidSourcePath)bin\Build$(Configuration)\nuget-unsigned\Microsoft.NET.Sdk.Android.Manifest-*.nupkg" />
     </ItemGroup>
     <PropertyGroup>
-      <_SdkManifestsFolder>$(DotNetPreviewPath)sdk-manifests\$(DotNetSdkManifestsFolder)\</_SdkManifestsFolder>
+      <_SdkManifestsFolder>$(_DotNetWorkloadUserManifestRoot)$(DotNetSdkManifestsFolder)\</_SdkManifestsFolder>
     </PropertyGroup>
     <Unzip
         SourceFiles="@(_WLManifest)"
@@ -136,9 +136,10 @@
       <_InstallArguments Include="--source &quot;%(_NuGetSources.Identity)&quot;" />
       <_InstallArguments Include="--temp-dir &quot;$(_TempDirectory)&quot;" />
     </ItemGroup>
-    <MakeDir Directories="$(_TempDirectory);$(BuildOutputDirectory)lib\sdk-manifests" />
+    <MakeDir Directories="$(_TempDirectory);$(_DotNetWorkloadManifestRoot)" />
     <Exec
         Command="&quot;$(DotNetPreviewTool)&quot; workload install @(_InstallArguments, ' ')"
+        EnvironmentVariables="$(_DotNetBuildEnvironment)"
         WorkingDirectory="$(_TempDirectory)"
     />
     <RemoveDir Directories="$(_TempDirectory)" />
@@ -151,18 +152,18 @@
       <_PackApiLevels Include="$(AndroidLatestUnstableApiLevel)" />
     </ItemGroup>
     <ItemGroup>
-      <_PackFoldersToDelete Include="$(DotNetPreviewPath)metadata" />
-      <_PackFoldersToDelete Include="$(DotNetPreviewPath)sdk-manifests\$(DotNetSdkManifestsFolder)\workloadsets" />
-      <_PackFoldersToDelete Include="$(DotNetPreviewPath)sdk-manifests\$(DotNetSdkManifestsFolder)\microsoft.net.sdk.android" />
-      <_PackFoldersToDelete Include="$(DotNetPreviewPath)packs\Microsoft.Android.Ref.%(_PackApiLevels.Identity)" />
-      <_PackFoldersToDelete Include="$(DotNetPreviewPath)packs\Microsoft.Android.Runtime.Mono.%(_PackApiLevels.Identity).android-arm" />
-      <_PackFoldersToDelete Include="$(DotNetPreviewPath)packs\Microsoft.Android.Runtime.Mono.%(_PackApiLevels.Identity).android-arm64" />
-      <_PackFoldersToDelete Include="$(DotNetPreviewPath)packs\Microsoft.Android.Runtime.Mono.%(_PackApiLevels.Identity).android-x86" />
-      <_PackFoldersToDelete Include="$(DotNetPreviewPath)packs\Microsoft.Android.Runtime.Mono.%(_PackApiLevels.Identity).android-x64" />
-      <_PackFoldersToDelete Include="$(DotNetPreviewPath)packs\Microsoft.Android.Sdk.Darwin" />
-      <_PackFoldersToDelete Include="$(DotNetPreviewPath)packs\Microsoft.Android.Sdk.Linux" />
-      <_PackFoldersToDelete Include="$(DotNetPreviewPath)packs\Microsoft.Android.Sdk.Windows" />
-      <_PackFoldersToDelete Include="$(DotNetPreviewPath)template-packs" />
+      <_PackFoldersToDelete Include="$(_DotNetWorkloadUserProfileRoot)metadata" />
+      <_PackFoldersToDelete Include="$(_DotNetWorkloadUserManifestRoot)$(DotNetSdkManifestsFolder)\workloadsets" />
+      <_PackFoldersToDelete Include="$(_DotNetWorkloadUserManifestRoot)$(DotNetSdkManifestsFolder)\microsoft.net.sdk.android" />
+      <_PackFoldersToDelete Include="$(_DotNetWorkloadUserPackRoot)Microsoft.Android.Ref.%(_PackApiLevels.Identity)" />
+      <_PackFoldersToDelete Include="$(_DotNetWorkloadUserPackRoot)Microsoft.Android.Runtime.Mono.%(_PackApiLevels.Identity).android-arm" />
+      <_PackFoldersToDelete Include="$(_DotNetWorkloadUserPackRoot)Microsoft.Android.Runtime.Mono.%(_PackApiLevels.Identity).android-arm64" />
+      <_PackFoldersToDelete Include="$(_DotNetWorkloadUserPackRoot)Microsoft.Android.Runtime.Mono.%(_PackApiLevels.Identity).android-x86" />
+      <_PackFoldersToDelete Include="$(_DotNetWorkloadUserPackRoot)Microsoft.Android.Runtime.Mono.%(_PackApiLevels.Identity).android-x64" />
+      <_PackFoldersToDelete Include="$(_DotNetWorkloadUserPackRoot)Microsoft.Android.Sdk.Darwin" />
+      <_PackFoldersToDelete Include="$(_DotNetWorkloadUserPackRoot)Microsoft.Android.Sdk.Linux" />
+      <_PackFoldersToDelete Include="$(_DotNetWorkloadUserPackRoot)Microsoft.Android.Sdk.Windows" />
+      <_PackFoldersToDelete Include="$(_DotNetWorkloadUserProfileRoot)template-packs" />
     </ItemGroup>
     <RemoveDir Directories="@(_PackFoldersToDelete)" />
   </Target>

build-tools/scripts/DotNet.targets

@@ -17,6 +17,7 @@
     <!-- Build out of process so NuGet-generated props are evaluated after restore. -->
     <Exec
         Command="&quot;$(DotNetPreviewTool)&quot; build &quot;$(_Root)src\openjdk\openjdk.csproj&quot; -p:Configuration=$(Configuration) -bl:$(_BinlogPathPrefix)-openjdk.binlog"
+        EnvironmentVariables="$(_DotNetBuildEnvironment)"
         WorkingDirectory="$(_Root)"
     />
   </Target>
@@ -25,6 +26,7 @@
       DependsOnTargets="PrepareOpenJDK">
     <Exec
         Command="&quot;$(DotNetPreviewTool)&quot; build -t:Prepare Java.Interop.slnx -c $(Configuration) -p:JdksRoot=$(JavaSdkDirectory) -p:DotnetToolPath=$(DotNetPreviewTool) -bl:$(_BinlogPathPrefix)-prepare-java-interop.binlog"
+        EnvironmentVariables="$(_DotNetBuildEnvironment)"
         WorkingDirectory="$(_Root)external\Java.Interop"
     />
   </Target>
@@ -92,7 +94,7 @@
   <Target Name="InstallMaui">
     <Error Text="%24(MauiVersion) must be specified." Condition=" '$(MauiVersion)' == '' and '$(MauiUseLocalPacks)' != 'true' " />
     <PropertyGroup>
-      <_TempDirectory>$(DotNetPreviewPath)..\.xa-workload-temp-$([System.IO.Path]::GetRandomFileName())</_TempDirectory>
+      <_TempDirectory>$(BuildOutputDirectory)obj\.xa-workload-temp-$([System.IO.Path]::GetRandomFileName())</_TempDirectory>
       <MauiVersionBand Condition=" '$(MauiVersionBand)' == '' ">$(DotNetSdkManifestsFolder)</MauiVersionBand>
     </PropertyGroup>
     <MakeDir Directories="$(_TempDirectory)" />
@@ -102,7 +104,7 @@
         Condition=" '$(MauiUseLocalPacks)' != 'true' "
         Command="&quot;$(DotNetPreviewTool)&quot; restore maui.proj -p:MauiVersion=$(MauiVersion) -p:MauiVersionBand=$(MauiVersionBand)"
         WorkingDirectory="$(MSBuildThisFileDirectory)"
-        EnvironmentVariables="NUGET_PACKAGES=$(_TempDirectory);DOTNET_MULTILEVEL_LOOKUP=0"
+        EnvironmentVariables="NUGET_PACKAGES=$(_TempDirectory);DOTNET_MULTILEVEL_LOOKUP=0;$(_DotNetWorkloadEnvironment)"
     />
     <ItemGroup>
       <_WLManifestPack Include="$(MauiPackagePath)\Microsoft.NET.Sdk.Maui.Manifest-$(MauiVersionBand.Substring (0,3))*.nupkg" />
@@ -120,7 +122,7 @@
     </ItemGroup>
     <!-- Copy manifest to diagnostics folder if specified -->
     <Copy Condition=" '$(MauiManifestDiagnosticsPath)' != '' " SourceFiles="@(_WLManifest)" DestinationFolder="$(MauiManifestDiagnosticsPath)" />
-    <Copy SourceFiles="@(_WLManifest)" DestinationFolder="$(DotNetPreviewPath)sdk-manifests\$(DotNetSdkManifestsFolder)\microsoft.net.sdk.maui" />
+    <Copy SourceFiles="@(_WLManifest)" DestinationFolder="$(_DotNetWorkloadUserManifestRoot)$(DotNetSdkManifestsFolder)\microsoft.net.sdk.maui" />
 
     <!-- Parse NuGet.config -->
     <XmlPeek
@@ -147,7 +149,7 @@
     <Exec
         Command="&quot;$(DotNetPreviewTool)&quot; workload install $(MauiWorkloadToInstall) @(_InstallArguments, ' ')"
         WorkingDirectory="$(_TempDirectory)"
-        EnvironmentVariables="DOTNET_MULTILEVEL_LOOKUP=0"
+        EnvironmentVariables="DOTNET_MULTILEVEL_LOOKUP=0;$(_DotNetBuildEnvironment)"
     />
     <RemoveDir Directories="$(_TempDirectory)" />
   </Target>

build-tools/scripts/Prepare.proj

@@ -22,10 +22,12 @@
     <!-- Build out of process so NuGet-generated props are evaluated after restore. -->
     <Exec
         Command="&quot;$(DotNetPreviewTool)&quot; build &quot;$(_TopDir)\build-tools\Xamarin.Android.Tools.BootstrapTasks\Xamarin.Android.Tools.BootstrapTasks.csproj&quot; -p:Configuration=$(Configuration) -bl:$(_BinlogPathPrefix)-bootstrap-tasks.binlog"
+        EnvironmentVariables="$(_DotNetBuildEnvironment)"
         WorkingDirectory="$(_TopDir)"
     />
     <Exec
         Command="&quot;$(DotNetPreviewTool)&quot; build &quot;$(_TopDir)\src\workloads\workloads.csproj&quot; -p:Configuration=$(Configuration) -bl:$(_BinlogPathPrefix)-workloads.binlog"
+        EnvironmentVariables="$(_DotNetBuildEnvironment)"
         WorkingDirectory="$(_TopDir)"
     />
     <CallTarget Targets="PrepareJavaInterop" />

build-tools/scripts/msbuild.mk

@@ -23,10 +23,26 @@
 #   $(MSBUILD_FLAGS): Additional MSBuild flags; contains $(CONFIGURATION), $(V), $(MSBUILD_ARGS).
 
 MSBUILD       = msbuild
-DOTNET_ROOT   = $(topdir)/bin/$(CONFIGURATION)/dotnet/
+DOTNET_INSTALL_LOCATION = $(topdir)/bin/$(CONFIGURATION)/dotnet-install-location.txt
+DOTNET_SDK_VERSION = $(shell sed -n 's|.*<MicrosoftNETSdkPackageVersion>\([^<]*\)</MicrosoftNETSdkPackageVersion>.*|\1|p' "$(topdir)/eng/Versions.props" | head -n 1)
+ifeq ($(strip $(TF_BUILD)$(GITHUB_ACTIONS)$(CI)),)
+_DOTNET_SHARED_ROOT = $(if $(wildcard $(DOTNET_INSTALL_LOCATION)),$(shell root=$$(cat "$(DOTNET_INSTALL_LOCATION)"); test -x "$${root}dotnet" && test -d "$${root}sdk/$(DOTNET_SDK_VERSION)" && printf '%s' "$$root"))
+endif
+DOTNET_ROOT   = $(if $(_DOTNET_SHARED_ROOT),$(_DOTNET_SHARED_ROOT),$(topdir)/bin/$(CONFIGURATION)/dotnet/)
 DOTNET_TOOL   = $(DOTNET_ROOT)dotnet
 DOTNET_VERB   = build
 MSBUILD_FLAGS = /p:Configuration=$(CONFIGURATION) $(MSBUILD_ARGS)
+ifneq ($(_DOTNET_SHARED_ROOT),)
+DOTNET_CLI_HOME = $(topdir)/bin/$(CONFIGURATION)/dotnet-home
+DOTNETSDK_WORKLOAD_MANIFEST_ROOTS = $(topdir)/bin/$(CONFIGURATION)/lib/sdk-manifests
+DOTNETSDK_WORKLOAD_PACK_ROOTS = $(topdir)/bin/$(CONFIGURATION)/lib
+NUGET_PACKAGES := $(patsubst %/,%,$(if $(NUGET_PACKAGES),$(NUGET_PACKAGES),$(HOME)/.nuget/packages))/
+
+export DOTNET_CLI_HOME
+export DOTNETSDK_WORKLOAD_MANIFEST_ROOTS
+export DOTNETSDK_WORKLOAD_PACK_ROOTS
+export NUGET_PACKAGES
+endif
 
 ifeq ($(OS_NAME),Darwin)
 _PKG_CONFIG   = /Library/Frameworks/Mono.framework/Commands/pkg-config
@@ -52,7 +68,7 @@ endef
 
 # $(call DOTNET_BINLOG,name,build=$(DOTNET_VERB),dotnet=$(DOTNET_TOOL))
 define DOTNET_BINLOG
-	$(if $(3),,PATH="$(DOTNET_ROOT):$(PATH)") $(if $(3),$(3),$(DOTNET_TOOL)) $(if $(2),$(2),$(DOTNET_VERB)) -p:Configuration=$(CONFIGURATION) -v:n $(MSBUILD_ARGS) \
+	$(if $(3),,PATH="$(DOTNET_ROOT):$(PATH)") $(if $(3),$(3),"$(DOTNET_TOOL)") $(if $(2),$(2),$(DOTNET_VERB)) -p:Configuration=$(CONFIGURATION) -v:n $(MSBUILD_ARGS) \
 		-bl:"$(dir $(realpath $(firstword $(MAKEFILE_LIST))))/bin/Build$(CONFIGURATION)/msbuild-`date +%Y%m%dT%H%M%S`-$(1).binlog"
 endef