diff --git a/eng/build.ps1 b/eng/build.ps1
index 9086c7de7bce7..300b675bad461 100644
--- a/eng/build.ps1
+++ b/eng/build.ps1
@@ -711,11 +711,6 @@ try {
     exit 1
   }
 
-  $regKeyProperty = Get-ItemProperty -Path HKLM:\SYSTEM\CurrentControlSet\Control\FileSystem -Name "LongPathsEnabled" -ErrorAction Ignore
-  if (($null -eq $regKeyProperty) -or ($regKeyProperty.LongPathsEnabled -ne 1)) {
-    Write-Host "LongPath is not enabled, you may experience build errors. You can avoid these by enabling LongPath with `"reg ADD HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem /v LongPathsEnabled /t REG_DWORD /d 1`""
-  }
-
   Process-Arguments
 
   . (Join-Path $PSScriptRoot "build-utils.ps1")
diff --git a/eng/enable-long-paths.reg b/eng/enable-long-paths.reg
new file mode 100644
index 0000000000000..a49f4aae6c1fa
--- /dev/null
+++ b/eng/enable-long-paths.reg
@@ -0,0 +1,4 @@
+Windows Registry Editor Version 5.00
+
+[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem]
+"LongPathsEnabled"=dword:00000001
diff --git a/eng/targets/Imports.targets b/eng/targets/Imports.targets
index 0cb7758b747c0..4da62950a42f5 100644
--- a/eng/targets/Imports.targets
+++ b/eng/targets/Imports.targets
@@ -154,6 +154,14 @@
                  Condition="$(_VersionComparisonResult) < 0"/>
   </Target> 
 
+  <Target Name="_CheckLongPathSupport" BeforeTargets="BeforeBuild" Condition="'$(MSBuildRuntimeType)' == 'Full'">
+    <PropertyGroup>
+      <_RoslynLongPathsEnabled>$([MSBuild]::GetRegistryValueFromView('HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\FileSystem', 'LongPathsEnabled', null, RegistryView.Registry64, RegistryView.Registry32))</_RoslynLongPathsEnabled>
+    </PropertyGroup>
+    
+    <Warning Condition="'$(_RoslynLongPathsEnabled)' != '1'" Text="Long paths are required for this project. Please run eng\enable-long-paths.reg" />
+  </Target> 
+
   <!-- 
     This target is used to copy referenced projects to a sub-directory vs. the direct output 
     directory of the build. Useful when the referenced project is an EXE and the referencing