diff --git a/.github/workflows/flutter-build.yml b/.github/workflows/flutter-build.yml
index da03231a0..abaf63ba1 100644
--- a/.github/workflows/flutter-build.yml
+++ b/.github/workflows/flutter-build.yml
@@ -396,6 +396,15 @@ jobs:
         # tree is reset around this second variant; and it locates the app as
         # <app-name>.exe inside the dist, so the dist copy is renamed to match.
         #
+        # The placeholder is chosen to keep this template as close to the shipped msi as
+        # possible: eight characters like "RustDesk", and a valid 8.3 name, so WiX
+        # derives no short name for it. A longer placeholder would get one, and a patch
+        # cannot rewrite a truncated placeholder, leaving short names pointing at it.
+        #
+        # It still has to be unique, which is why "RustDesk" itself cannot be used:
+        # it also names payload that must never be renamed, such as librustdesk.dll
+        # and drivers\RustDeskPrinterDriver.
+        #
         # Building the arm64 template on the native arm64 runner is what makes ARM
         # custom clients possible at all: the build agents are x64 and cannot run
         # preprocess.py against an ARM exe.
@@ -403,9 +412,9 @@ jobs:
         run: |
           git checkout -- res/msi
           cp -r ./rustdesk ./rustdesk-msi-template
-          mv ./rustdesk-msi-template/rustdesk.exe ./rustdesk-msi-template/__RDAPPNAME__.exe
+          mv ./rustdesk-msi-template/rustdesk.exe ./rustdesk-msi-template/RDAPPNAM.exe
           pushd ./res/msi
-          python preprocess.py --arp -d ../../rustdesk-msi-template --app-name __RDAPPNAME__
+          python preprocess.py --arp -d ../../rustdesk-msi-template --app-name RDAPPNAM
           $msiPlatform = if ('${{ matrix.job.arch }}' -eq 'aarch64') { 'ARM64' } else { 'x64' }
           msbuild msi.sln -t:clean -p:Configuration=Release -p:Platform=$msiPlatform
           msbuild msi.sln -p:Configuration=Release -p:Platform=$msiPlatform /p:TargetVersion=Windows10