diff --git a/winiso/winpefs/Scripts/Startup.ps1 b/winiso/winpefs/Scripts/Startup.ps1
index 7f62013e..18d13d5e 100644
--- a/winiso/winpefs/Scripts/Startup.ps1
+++ b/winiso/winpefs/Scripts/Startup.ps1
@@ -1,3 +1,2 @@
-$drives = & wmic volume get "DriveLetter,Label";
-$env:SETUP_DRIVE = $($($drives | Select-String -Pattern "$env:SETUP_LABEL") -split "\s+")[0];
+$env:SETUP_DRIVE = (ConvertFrom-Csv ((wmic volume where "Label='$env:SETUP_LABEL'" get DriveLetter) | ForEach-Object { "$_".Trim(); })).DriveLetter;
 Set-Location (Join-Path $env:SETUP_DRIVE $env:LOCAL_PROJECT_PATH)