--- mono/build/install.proj.orig	2018-05-02 18:19:31 UTC
+++ mono/build/install.proj
@@ -8,8 +8,8 @@
         <Error Text="%24(TargetMSBuildToolsVersion) cannot be empty." Condition="'$(TargetMSBuildToolsVersion)' == ''" />
 
         <PropertyGroup>
-            <MSBuildInstallBinDir>$(MonoInstallPrefix)\lib\mono\msbuild\$(TargetMSBuildToolsVersion)\bin</MSBuildInstallBinDir>
-            <XBuildDir>$(MonoInstallPrefix)\lib\mono\xbuild</XBuildDir>
+            <MSBuildInstallBinDir>$(DESTDIR)$(MonoInstallPrefix)\lib\mono\msbuild\$(TargetMSBuildToolsVersion)\bin</MSBuildInstallBinDir>
+            <XBuildDir>$(DESTDIR)$(MonoInstallPrefix)\lib\mono\xbuild</XBuildDir>
 
             <MSBuildBinSrcDir>$(RepoRoot)artifacts\2\$(Configuration)\bin\MSBuild.Bootstrap\net461\</MSBuildBinSrcDir>
 
@@ -134,17 +134,17 @@
             WorkingDirectory="$(MSBuildInstallBinDir)"
             Command="ln -s Roslyn/System.Reflection.Metadata.dll System.Reflection.Metadata.dll" />
 
-        <Exec Command="$(RepoRoot)\mono\build\gen_msbuild_wrapper.sh $(MonoInstallPrefix) $(MonoInstallPrefix)\bin" />
+        <Exec Command="$(RepoRoot)\mono\build\gen_msbuild_wrapper.sh $(MonoInstallPrefix) $(DESTDIR)$(MonoInstallPrefix)\bin" />
         <ItemGroup>
-            <CopiedFiles Include="$(MonoInstallPrefix)\bin\msbuild" />
+            <CopiedFiles Include="$(DESTDIR)$(MonoInstallPrefix)\bin\msbuild" />
         </ItemGroup>
 
-        <Copy SourceFiles="$(RepoRoot)\mono\msbuild.1" DestinationFolder="$(MonoInstallPrefix)\share\man\man1">
+        <Copy SourceFiles="$(RepoRoot)\mono\msbuild.1" DestinationFolder="$(DESTDIR)$(MonoInstallPrefix)\share\man\man1">
             <Output TaskParameter="CopiedFiles" ItemName="CopiedFiles" />
         </Copy>
 
         <ItemGroup>
-            <_CopiedFiles_Relative_Tmp Include="@(CopiedFiles -> '$([MSBuild]::MakeRelative('$(MonoInstallPrefix)', %(CopiedFiles.Identity)))' )" />
+            <_CopiedFiles_Relative_Tmp Include="@(CopiedFiles -> '$([MSBuild]::MakeRelative('$(DESTDIR)$(MonoInstallPrefix)', %(CopiedFiles.Identity)))' )" />
             <CopiedFiles_Relative Include="@(_CopiedFiles_Relative_Tmp -> Distinct())" />
         </ItemGroup>