diff --git a/package.json b/package.json
index 228eb9c451..edb46a0725 100644
--- a/package.json
+++ b/package.json
@@ -508,8 +508,8 @@
           "description": "Specifies the visibility of the Command Explorer in the PowerShell Side Bar."
         },
         "powershell.sideBar.CommandExplorerExcludeFilter": {
-          "type":"array",
-          "default":[],
+          "type": "array",
+          "default": [],
           "description": "Specify array of Modules to exclude from Command Explorer listing."
         },
         "powershell.powerShellExePath": {
diff --git a/vscode-powershell.build.ps1 b/vscode-powershell.build.ps1
index 47c3ecab66..6c4635e0f1 100644
--- a/vscode-powershell.build.ps1
+++ b/vscode-powershell.build.ps1
@@ -60,9 +60,9 @@ task ResolveEditorServicesPath -Before CleanEditorServices, BuildEditorServices,
     }
 }
 
-task Restore RestoreNodeModules -Before Build
+task Restore RestoreNodeModules -Before Build -If { -not (Test-Path "$PSScriptRoot/node_modules") }
 
-task RestoreNodeModules -If { -not (Test-Path "$PSScriptRoot/node_modules") } {
+task RestoreNodeModules {
 
     Write-Host "`n### Restoring vscode-powershell dependencies`n" -ForegroundColor Green
 
@@ -76,6 +76,7 @@ task Clean {
     Write-Host "`n### Cleaning vscode-powershell`n" -ForegroundColor Green
     Remove-Item .\modules\* -Exclude "README.md" -Recurse -Force -ErrorAction Ignore
     Remove-Item .\out -Recurse -Force -ErrorAction Ignore
+    exec { & npm prune }
 }
 
 task CleanEditorServices {