[docker-outside-of-docker] packages for moby not available in OS debian trixie (amd64)

[minhio]

When using ghcr.io/devcontainers/features/docker-outside-of-docker:1 inside of mcr.microsoft.com/devcontainers/base:trixie, the devcontainer build failed with the following error:

 > [dev_containers_target_stage 5/5] RUN --mount=type=bind,from=dev_containers_feature_content_source,source=docker-outside-of-docker_0,target=/tmp/build-features-src/docker-outside-of-docker_0     cp -ar /tmp/build-features-src/docker-outside-of-docker_0 /tmp/dev-container-features  && chmod -R 0755 /tmp/dev-container-features/docker-outside-of-docker_0  && cd /tmp/dev-container-features/docker-outside-of-docker_0  && chmod +x ./devcontainer-features-install.sh  && ./devcontainer-features-install.sh  && rm -rf /tmp/dev-container-features/docker-outside-of-docker_0:
0.322 ===========================================================================
0.322 Feature       : Docker (docker-outside-of-docker)
0.322 Description   : Re-use the host docker socket, adding the Docker CLI to a container. Feature invokes a script to enable using a forwarded Docker socket within a container to run Docker commands.
0.322 Id            : ghcr.io/devcontainers/features/docker-outside-of-docker
0.322 Version       : 1.6.4
0.322 Documentation : https://github.com/devcontainers/features/tree/main/src/docker-outside-of-docker
0.322 Options       :
0.322     VERSION="latest"
0.322     MOBY="true"
0.322     MOBYBUILDXVERSION="latest"
0.322     DOCKERDASHCOMPOSEVERSION="v2"
0.322     INSTALLDOCKERBUILDX="true"
0.322     INSTALLDOCKERCOMPOSESWITCH="true"
0.322 ===========================================================================
0.338 Distro codename  'trixie'  matched filter  'trixie bookworm buster bullseye bionic focal jammy noble plucky'
1.659 Get:1 http://deb.debian.org/debian trixie InRelease [138 kB]
1.708 Get:2 http://deb.debian.org/debian trixie-updates InRelease [47.1 kB]
1.728 Get:3 http://deb.debian.org/debian-security trixie-security InRelease [43.4 kB]
1.751 Get:4 http://deb.debian.org/debian trixie/main amd64 Packages [9668 kB]
1.922 Get:5 http://deb.debian.org/debian trixie-updates/main amd64 Packages [2432 B]
1.940 Get:6 http://deb.debian.org/debian-security trixie-security/main amd64 Packages [33.1 kB]
2.128 Get:7 https://packages.microsoft.com/repos/microsoft-debian-trixie-prod trixie InRelease [3952 B]
2.182 Get:8 https://packages.microsoft.com/repos/microsoft-debian-trixie-prod trixie/main all Packages [342 B]
2.602 Fetched 9936 kB in 1s (9115 kB/s)
2.602 Reading package lists...
3.303 Reading package lists...
4.135 Building dependency tree...
4.328 Reading state information...
4.359 E: Unable to locate package moby-cli
4.359 E: Unable to locate package moby-buildx
4.361 (!) It seems packages for moby not available in OS debian trixie (amd64). To resolve, either: (1) set feature option '"moby": false' , or (2) choose a compatible OS version (eg: 'ubuntu-24.04').
[2025-09-04T19:54:52.589Z] 
4.361 ERROR: Feature "Docker (docker-outside-of-docker)" (ghcr.io/devcontainers/features/docker-outside-of-docker) failed to install! Look at the documentation at https://github.com/devcontainers/features/tree/main/src/docker-outside-of-docker for help troubleshooting this error.

To reproduce, use the following .devcontainer.json

{
	"image": "mcr.microsoft.com/devcontainers/base:trixie",
	"features": {
		"ghcr.io/devcontainers/features/docker-outside-of-docker:1": {}
	}
}

Works fine with mcr.microsoft.com/devcontainers/base:bookworm and base:bullseye

[kevin-brashears-fhr]

seeing the same for docker-in-docker

#16 6.708 E: Unable to locate package moby-cli
#16 6.708 E: Unable to locate package moby-buildx
#16 6.708 E: Unable to locate package moby-engine
#16 6.710 (!) Packages for moby not available in OS debian trixie (amd64). To resolve, either: (1) set feature option '"moby": false' , or (2) choose a compatible OS version (eg: 'ubuntu-24.04').
#16 6.710 ERROR: Feature "Docker (Docker-in-Docker)" (ghcr.io/devcontainers/features/docker-in-docker) failed to install! Look at the documentation at ********/devcontainers/features/tree/main/src/docker-in-docker for help troubleshooting this error.
2025-09-04 21:14:21.560Z: #16 ERROR: process "/bin/sh -c cp -ar /tmp/build-features-src/docker-in-docker_0 /tmp/dev-container-features  && chmod -R 0755 /tmp/dev-container-features/docker-in-docker_0  && cd /tmp/dev-container-features/docker-in-docker_0  && chmod +x ./devcontainer-features-install.sh  && ./devcontainer-features-install.sh  && rm -rf /tmp/dev-container-features/docker-in-docker_0" did not complete successfully: exit code: 1

saw this release that says it added trixie support yesterday

disabling docker-in-docker and rebuilding devcontainer starts container properly but obviously I need docker in my devcontainer

[sireeshajonnalagadda]

Hi @minhio,

Thank you for reporting this issue and for the detailed information you’ve provided.
Just to update you — the pre-built dev container image for Debian Trixie (13) was published on September 3rd. I’m currently checking the issue in both docker-outside-of-docker and docker-in-docker configurations.

In the meantime, could you please confirm if you're still experiencing the problem on your end?

Best regards,
Sireesha

[minhio]

Hi @minhio,

Thank you for reporting this issue and for the detailed information you’ve provided. Just to update you — the pre-built dev container image for Debian Trixie (13) was published on September 3rd. I’m currently checking the issue in both docker-outside-of-docker and docker-in-docker configurations.

In the meantime, could you please confirm if you're still experiencing the problem on your end?

Best regards, Sireesha

Hi @sireeshajonnalagadda, yes I'm still seeing the issue on my end. Thanks!

[volchan]

got the same issue for arm64

3.021 (!) It seems packages for moby not available in OS debian trixie (arm64). To resolve, either: (1) set feature option '"moby": false' , or (2) choose a compatible OS version (eg: 'ubuntu-24.04').

[Kaniska244]

Hello @minhio ,

Thank you for reporting this issue. I am afraid for both docker-outside-of-docker and docker-in-docker features moby: true option doesn't work in Debian Trixie(13) as moby-cli related library packages are removed for trixie. I would suggest using both this features with moby: false option for the moment in debian trixie(13), ref or at least momentarily use other versions of the debian distro.

[Synse]

Thank you for reporting this issue. I am afraid for both docker-outside-of-docker and docker-in-docker features moby: true option doesn't work in Debian Trixie(13) as moby-cli related library packages are removed for trixie.

Could (should?) the install scripts set moby: false if Trixie is detected? 🤔

[Kaniska244]

Hi @Synse ,

That is indeed an excellent suggestion. Let me check and get back to you.