# MFE Docker image build failing — apt 404 errors on Debian bullseye packages

**URL:** <https://discuss.openedx.org/t/mfe-docker-image-build-failing-apt-404-errors-on-debian-bullseye-packages/19549>\
**Category:** Show & Tell\
**Tags:** tutor, ulmo\
**Created:** [September 6, 2026, 4:40am UTC](https://discuss.openedx.org/t/mfe-docker-image-build-failing-apt-404-errors-on-debian-bullseye-packages/19549 "2026-09-06T04:40:57Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![Abdul\_Muqadim](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.openedx.org/abdul_muqadim/32/9226_2.png) [@Abdul\_Muqadim](https://discuss.openedx.org/u/Abdul_Muqadim)\
**Post date:** [September 17, 2026, 6:46pm UTC](https://discuss.openedx.org/t/mfe-docker-image-build-failing-apt-404-errors-on-debian-bullseye-packages/19549/7 "2026-09-17T18:46:26Z")

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We have back ported this fix to ulmo, teak, sumac and redwood as well, for more info refer to [Tutor-mfe: bullseye EOL fix backported to Redwood, Sumac, Teak and Ulmo](https://discuss.openedx.org/t/tutor-mfe-bullseye-eol-fix-backported-to-redwood-sumac-teak-and-ulmo/19678)

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