diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index 1fb147a..47e223e 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -19,25 +19,19 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Debug — show what checkout produced
+      - name: Add Office-capable MSBuild to PATH
         shell: powershell
         run: |
-          Write-Host "CWD: $(Get-Location)"
-          Write-Host "GITHUB_WORKSPACE: $env:GITHUB_WORKSPACE"
-          Write-Host ""
-          Write-Host "=== Top-level entries ==="
-          Get-ChildItem -Force | Format-Table Name, Length, Mode
-          Write-Host ""
-          Write-Host "=== All .csproj and .sln files ==="
-          Get-ChildItem -Recurse -File -Include *.csproj,*.sln -ErrorAction SilentlyContinue |
-              ForEach-Object { Write-Host "$($_.FullName) ($($_.Length) bytes)" }
-          Write-Host ""
-          Write-Host "=== src/ tree ==="
-          if (Test-Path src) { Get-ChildItem -Recurse src -Depth 1 -ErrorAction SilentlyContinue | ForEach-Object { Write-Host $_.FullName } }
-          else { Write-Host "src/ does not exist!" }
-
-      - name: Add MSBuild to PATH
-        uses: microsoft/setup-msbuild@v2
+          # microsoft/setup-msbuild@v2 picks `vswhere -latest`, which prefers
+          # Build Tools 2022. Build Tools has no VSTO targets (MSB4226), so
+          # locate a VS installation that explicitly has the Office workload
+          # (the one that ships Microsoft.VisualStudio.Tools.Office.targets).
+          $vswhere = "${env:ProgramFiles(x86)}\Microsoft Visual Studio\Installer\vswhere.exe"
+          $installPath = & $vswhere -products * -requires Microsoft.VisualStudio.Workload.Office -property installationPath | Select-Object -First 1
+          if (-not $installPath) { throw "No VS installation with the Office workload found on this runner." }
+          $msbuildDir = Join-Path $installPath 'MSBuild\Current\Bin'
+          Write-Host "Using MSBuild from $msbuildDir"
+          Add-Content -Path $env:GITHUB_PATH -Value $msbuildDir
 
       - name: Setup NuGet
         uses: nuget/setup-nuget@v2
@@ -66,8 +60,13 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Add MSBuild to PATH
-        uses: microsoft/setup-msbuild@v2
+      - name: Add Office-capable MSBuild to PATH
+        shell: powershell
+        run: |
+          $vswhere = "${env:ProgramFiles(x86)}\Microsoft Visual Studio\Installer\vswhere.exe"
+          $installPath = & $vswhere -products * -requires Microsoft.VisualStudio.Workload.Office -property installationPath | Select-Object -First 1
+          if (-not $installPath) { throw "No VS installation with the Office workload found on this runner." }
+          Add-Content -Path $env:GITHUB_PATH -Value (Join-Path $installPath 'MSBuild\Current\Bin')
 
       - name: Setup NuGet
         uses: nuget/setup-nuget@v2