diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c89feb40..f9786c96 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -130,8 +130,8 @@ jobs:
       run: |
         winget install -e --id NSIS.NSIS --silent --accept-source-agreements --accept-package-agreements
         $paths = @(
-          "$Env:ProgramFiles\NSIS\Bin",
-          "$Env:ProgramFiles(x86)\NSIS\Bin"
+          (Join-Path ${env:ProgramFiles}      'NSIS\Bin'),
+          (Join-Path ${env:ProgramFiles(x86)} 'NSIS\Bin')
         ) | Where-Object { Test-Path $_ }
 
         if ($paths.Count -eq 0) {