Implement script to prepare packages with Node.js

helpers/nix-helpers.psm1

@@ -0,0 +1,16 @@
+<#
+.SYNOPSIS
+Unpack *.tar file
+#>
+function Extract-TarArchive {
+    param(
+        [Parameter(Mandatory=$true)]
+        [String]$ArchivePath,
+        [Parameter(Mandatory=$true)]
+        [String]$OutputDirectory
+    )
+
+    Write-Debug "Extract $ArchivePath to $OutputDirectory"
+    tar -C $OutputDirectory -xzf $ArchivePath --strip 1
+
+}