diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index d7d45706e..12589ab5c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -205,4 +205,8 @@ windows_provision:
     - refreshenv; corepack enable
     - '& "C:\Program Files\Git\cmd\git.exe" --version'
     - '& "C:\Program Files\nodejs\node.exe" --version'
+    # Windows-260-Zeichen-Pfadlimit: die Visual-Baseline-Pfade des Monorepos sprengen
+    # MAX_PATH - beide Schalter noetig (git-seitig + OS-Policy)
+    - '& "C:\Program Files\Git\cmd\git.exe" config --system core.longpaths true'
+    - Set-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\FileSystem' -Name LongPathsEnabled -Value 1 -Type DWord
     - Start-Process powershell -ArgumentList '-Command','Start-Sleep 10; Restart-Service gitlab-runner -Force'