diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index fb8eacff0..b8d2c5728 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -134,6 +134,7 @@ jobs:
         with:
           name: ${{ matrix.config.name }} - installer
           path: build/Aegisub-*.exe
+          if-no-files-found: error
       
       - name: Upload artifacts - portable.zip
         uses: actions/upload-artifact@v3
@@ -155,3 +156,4 @@ jobs:
         with:
           name: ${{ matrix.config.name }} - installer
           path: build/Aegisub-*.dmg
+          if-no-files-found: error
diff --git a/tools/win-installer-setup.ps1 b/tools/win-installer-setup.ps1
index f2638ad4b..ca46d8886 100644
--- a/tools/win-installer-setup.ps1
+++ b/tools/win-installer-setup.ps1
@@ -69,7 +69,9 @@ if (!(Test-Path ffi-experiments)) {
 	git clone https://github.com/TypesettingTools/ffi-experiments.git
 	Set-Location ffi-experiments
 	meson build -Ddefault_library=static
+	if(!$?) { Exit $LASTEXITCODE }
 	meson compile -C build
+	if(!$?) { Exit $LASTEXITCODE }
 	Set-Location $DepsDir
 }
 
@@ -91,7 +93,9 @@ if (!(Test-Path dictionaries)) {
 # localization
 Set-Location $BuildRoot
 meson compile aegisub-gmo
+if(!$?) { Exit $LASTEXITCODE }
 
 # Invoke InnoSetup
 $IssUrl = Join-Path $InstallerDir "aegisub_depctrl.iss"
 iscc $IssUrl
+if(!$?) { Exit $LASTEXITCODE }
\ No newline at end of file