diff --git a/.gitea/workflows/build_iso.yaml b/.gitea/workflows/build_iso.yaml
index 4ce4b13..a41e636 100644
--- a/.gitea/workflows/build_iso.yaml
+++ b/.gitea/workflows/build_iso.yaml
@@ -20,8 +20,9 @@ jobs:
 
       - name: Install software
         run: |
+          sudo apt-add-repository universe
           sudo apt-get update
-          sudo apt-get install -y make rsync clang-21 clang-tools-21 bear llvm-21 lld
+          sudo apt-get install -y make rsync clang-21 clang-tools-21 bear llvm-21 lld xorriso
           sudo ln -sf /usr/bin/clang-21 /usr/bin/clang
           sudo ln -sf /usr/bin/clang-doc-21 /usr/bin/clang-doc
           sudo ln -sf /usr/bin/llvm-ar-21 /usr/bin/llvm-ar