diff --git a/make/ci_dev_workshop.py b/make/ci_dev_workshop.py
index 8515796..cc7bf50 100644
--- a/make/ci_dev_workshop.py
+++ b/make/ci_dev_workshop.py
@@ -352,14 +352,11 @@ def run_pboproject(addon: str, source_root: Path, output_dir: Path) -> None:
             "+O" if addon in obfuschatedList else "-O",
         ]
     else:
-        source = repo_root() / addon
-        fallback = output_dir / f"{addon}.pbo"
-        print(
-            "Mikero pboProject is not available; writing raw DEV PBO "
-            f"for {addon} at {fallback}"
+        raise RuntimeError(
+            "Mikero pboProject is required to build DEV Workshop PBOs. "
+            "The installed DePbo makepbo tool only creates a raw archive and "
+            "must not be published as a BRAF build."
         )
-        write_raw_pbo(addon, source, fallback)
-        return
 
     print(f"::group::Building {addon}")
     print(" ".join(cmd))
@@ -467,12 +464,14 @@ def main() -> int:
         source_root = Path(args.source_root).resolve()
     elif args.dry_run:
         source_root = (cache_dir / "mikero-source" / "braf").resolve()
-    elif not (shutil.which("pboproject") or shutil.which("pboProject")):
-        source_root = root
-    else:
+    elif shutil.which("pboproject") or shutil.which("pboProject"):
         source_root_addons = requested_addons if requested_addons is not None else addons
         source_root = prepare_mikero_source_root(root, cache_dir, source_root_addons).resolve()
-
+    else:
+        raise RuntimeError(
+            "Mikero pboProject is not installed. Refusing to stage or publish "
+            "raw PBO archives as a DEV Workshop build."
+        )
     current_hashes = {addon: addon_digest(root / addon) for addon in addons}
     manifest = load_manifest(manifest_path)
     manifest_addons = manifest.setdefault("addons", {})