diff --git a/build.ps1 b/build.ps1
index bbf5d5b3..2b894cd2 100644
--- a/build.ps1
+++ b/build.ps1
@@ -716,20 +716,21 @@ if ($packageType -eq 'msixbundle') {
         $architecture
     }
 
-    $packageName = "DSC-$productVersion-$productArchitecture.tar"
+    Write-Verbose -Verbose "Creating tar.gz file"
+    $packageName = "DSC-$productVersion-$productArchitecture.tar.gz"
     $tarFile = Join-Path $PSScriptRoot 'bin' $packageName
-    tar cvf $tarFile -C $tgzTarget .
+    tar -czvf $tarFile -C $tgzTarget .
     if ($LASTEXITCODE -ne 0) {
-        throw "Failed to create tar file"
+        throw "Failed to create tar.gz file"
     }
-    Write-Host -ForegroundColor Green "`nTar file is created at $tarFile"
 
-    $gzFile = "$tarFile.gz"
-    gzip -c $tarFile > $gzFile
-    if ($LASTEXITCODE -ne 0) {
-        throw "Failed to create gz file"
+    # check it's valid
+    $out = file $tarFile
+    if ($out -notmatch 'gzip compressed data') {
+        throw "Invalid tar.gz file"
     }
-    Write-Host -ForegroundColor Green "`nGz file is created at $gzFile"
+
+    Write-Host -ForegroundColor Green "`ntar.gz file is created at $tarFile"
 }
 
 $env:RUST_BACKTRACE=1