diff --git a/installer/build.ps1 b/installer/build.ps1
index 9afe8fc1..8a4b0d4d 100644
--- a/installer/build.ps1
+++ b/installer/build.ps1
@@ -1,12 +1,12 @@
 [CmdletBinding()]
 Param (
-  [Parameter(Mandatory=$true)]
-  [String] $PathToExecutable,
-  [Parameter(Mandatory=$true)]
-  [String] $Version,
-  [Parameter(Mandatory=$false)]
-  [ValidateSet("amd64","386")]
-  [String] $Arch = "amd64"
+    [Parameter(Mandatory = $true)]
+    [String] $PathToExecutable,
+    [Parameter(Mandatory = $true)]
+    [String] $Version,
+    [Parameter(Mandatory = $false)]
+    [ValidateSet("amd64", "386")]
+    [String] $Arch = "amd64"
 )
 $ErrorActionPreference = "Stop"
 
@@ -15,32 +15,32 @@ $PathToExecutable = Resolve-Path $PathToExecutable
 # Set working dir to this directory, reset previous on exit
 Push-Location $PSScriptRoot
 Trap {
-  # Reset working dir on error
-  Pop-Location
+    # Reset working dir on error
+    Pop-Location
 }
 
 if ($PSVersionTable.PSVersion.Major -lt 5) {
-  Write-Error "Powershell version 5 required"
-  exit 1
+    Write-Error "Powershell version 5 required"
+    exit 1
 }
 
 $wc = New-Object System.Net.WebClient
 function Get-FileIfNotExists {
-  Param (
-    $Url,
-    $Destination
-  )
-  if(-not (Test-Path $Destination)) {
-    Write-Verbose "Downloading $Url"
-    $wc.DownloadFile($Url, $Destination)
-  }
-  else {
-    Write-Verbose "${Destination} already exists. Skipping."
-  }
+    Param (
+        $Url,
+        $Destination
+    )
+    if (-not (Test-Path $Destination)) {
+        Write-Verbose "Downloading $Url"
+        $wc.DownloadFile($Url, $Destination)
+    }
+    else {
+        Write-Verbose "${Destination} already exists. Skipping."
+    }
 }
 
 $sourceDir = mkdir -Force Source
-mkdir -Force Work,Output | Out-Null
+mkdir -Force Work, Output | Out-Null
 
 Write-Verbose "Downloading WiX..."
 [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
@@ -51,7 +51,7 @@ Expand-Archive -Path "${sourceDir}\wix-binaries.zip" -DestinationPath WiX -Force
 Copy-Item -Force $PathToExecutable Work/wmi_exporter.exe
 
 Write-Verbose "Creating wmi_exporter-${Version}-${Arch}.msi"
-$wixArch = @{"amd64"="x64"; "386"="x86"}[$Arch]
+$wixArch = @{"amd64" = "x64"; "386" = "x86"}[$Arch]
 $wixOpts = "-ext WixFirewallExtension"
 Invoke-Expression "WiX\candle.exe -nologo -arch $wixArch $wixOpts -out Work\wmi_exporter.wixobj -dVersion=`"$Version`" wmi_exporter.wxs"
 Invoke-Expression "WiX\light.exe -nologo -spdb $wixOpts -out `"Output\wmi_exporter-${Version}-${Arch}.msi`" Work\wmi_exporter.wixobj"