diff --git a/.github/workflows/iso.yml b/.github/workflows/iso.yml
index bd5fa1d9..844139b5 100644
--- a/.github/workflows/iso.yml
+++ b/.github/workflows/iso.yml
@@ -42,7 +42,7 @@ jobs:
     - name: Install needed packages
       run: |
         sudo rm -rf /var/lib/apt/lists/*
-        sudo sed -i 's/jammy/mantic/g' /etc/apt/sources.list
+        sudo sed -i 's/jammy/.\/devel/g' /etc/apt/sources.list
         sudo apt-get update && sudo apt-get install --reinstall debootstrap mtools dosfstools qemu-user-static binfmt-support dpkg-dev -y
         sudo ln -sfn /usr/share/debootstrap/scripts/gutsy /usr/share/debootstrap/scripts/noble
         sudo dpkg -i debs/live-build_*_all.deb