diff --git a/appveyor.yml b/appveyor.yml
index 3a9a34b8a..0a04c0d4f 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -2,7 +2,7 @@ version: 3.0.1.{build}
 image: Visual Studio 2019
 clone_folder: C:\ProxSpace\pm3\proxmark
 cache:
-  - C:\ps-cache
+  - C:\ps-cache -> appveyor.yml
 environment:
   proxspace_url: https://github.com/Gator96100/ProxSpace/archive/master.zip
   proxspace_zip_file: \proxspace.zip
@@ -52,8 +52,6 @@ clone_script:
         Write-Host "[ OK ]" -ForegroundColor Green 
     }
     
-    $global:wsl_install_running = true
-    
     $WSLjob = Start-Job -Name WSLInstall -ScriptBlock { 
         Function WSLExec($Text, $Cmd) {
             Write-Host "$Text" 
@@ -69,7 +67,7 @@ clone_script:
         WSLExec "WSL install..." "sudo apt-get -y install --reinstall --no-install-recommends git ca-certificates build-essential pkg-config libreadline-dev gcc-arm-none-eabi libnewlib-dev libbz2-dev qtbase5-dev cmake 1>/dev/null" 
         WSLExec "WSL QT fix..." "sudo strip --remove-section=.note.ABI-tag /usr/lib/x86_64-linux-gnu/libQt5Core.so.5"
         Add-AppveyorMessage -Message "WSL setup took $(([System.Environment]::TickCount-$WSLInstallTime) / 1000) sec" -Category Information
-        $global:wsl_install_running = false
+        New-Item -ItemType "file" -Path "C:\WSL-Finished.txt" -Force
     }
     
     $env:PSInstallTime=[System.Environment]::TickCount
@@ -237,15 +235,14 @@ build_script:
         }
         
         #WSL: wait for installation to finish
-        if($global:wsl_install_running){
+        if(!(Test-Path "C:\WSL-Finished.txt")){
             Write-Host "Waiting for WSL installation to finish..." -NoNewLine
-            while($global:wsl_install_running) {
+            while(!(Test-Path "C:\WSL-Finished.txt")) {
                 Start-Sleep -s 5
             }
-            Write-Host "$Name [ OK ]" -ForegroundColor Green
+            Remove-Item -Force "C:\WSL-Finished.txt" -ErrorAction SilentlyContinue
+            Write-Host "$Name [ OK ]" -ForegroundColor Green       
         }
-        
-         Add-AppveyorMessage -Message "WSL start: $global:wsl_install_running" -Category Information
     
         #Windows Subsystem for Linux (WSL)
         Write-Host "---------- WSL make ----------" -ForegroundColor Yellow