diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index 22041d2..2ba12ca 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -23,6 +23,10 @@ jobs:
   build_push:
     name: Build and push image
     runs-on: ubuntu-24.04
+    # WICHTIG: Diese Umgebungsvariablen lösen den "unshare"-Fehler
+    env:
+      BUILDAH_ISOLATION: chroot
+      STORAGE_DRIVER: vfs
     permissions:
       contents: read
       packages: write