docker setup fails: target ente-web: failed to solve [...] did not complete successfully: exit code: 1

[audricd]

Hello,

I am following step by step this guide:
https://ente.io/help/self-hosting/installation/compose

Repro step:

1. Set up new debian 13 LXC on proxmox
2. give it these newlines config for docker to work

lxc.cap.drop: 
lxc.apparmor.profile: unconfined
lxc.mount.auto: proc:rw sys:rw
lxc.mount.entry: /proc/sys/net/ipv4/ip_unprivileged_port_start proc/sys/net/ipv4/ip_unprivileged_port_start none bind,create=file,optional 0 0

3. set up docker
4. git clone https://github.com/ente-io/ente
5. cd ente/server/config
6. made the following modifications:

• in env: set up password for db and credentials for minio
• in compose,yaml, removed volume for minio and set up a path (s3 data i want on another drive, a mountpoint of the lxc)
• in musuem, used ${VARIABLES} for sensitive data

and nothing else

7. docker compose up --build

relevant output:

=> => sha256:bc1da058f299723f8258c5a82dd007d1dd72e275087b726d5e1be5ef6198f286 3.64MB / 3.64MB                                        0.5s
 => => extracting sha256:bc1da058f299723f8258c5a82dd007d1dd72e275087b726d5e1be5ef6198f286                                             0.5s
 => [museum builder 2/8] RUN apk add --no-cache gcc musl-dev git build-base pkgconfig                                                17.1s
 => [ente-web stage-1  2/11] WORKDIR /out                                                                                             1.2s
 => [museum builder 3/8] WORKDIR /etc/ente/                                                                                           1.5s
 => [museum builder 4/8] COPY go.mod .                                                                                                2.4s
 => [museum builder 5/8] COPY go.sum .                                                                                                1.3s
 => [museum builder 6/8] RUN go mod download                                                                                         54.9s
 => [museum builder 7/8] COPY . .                                                                                                     3.2s
 => ERROR [ente-web builder  2/14] RUN apt-get update && apt-get install -y curl build-essential && rm -rf /var/lib/apt/lists/* &&   62.1s
 => CANCELED [museum builder 8/8] RUN --mount=type=cache,target=/root/.cache/go-build   go build -o museum cmd/museum/main.go        63.0s
------
 > [ente-web builder  2/14] RUN apt-get update && apt-get install -y curl build-essential && rm -rf /var/lib/apt/lists/* &&     curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain stable --target wasm32-unknown-unknown:
1.724 Get:1 http://deb.debian.org/debian bookworm InRelease [151 kB]
1.883 Get:2 http://deb.debian.org/debian bookworm-updates InRelease [55.4 kB]
1.883 Get:3 http://deb.debian.org/debian-security bookworm-security InRelease [48.0 kB]
2.650 Get:4 http://deb.debian.org/debian bookworm/main amd64 Packages [8792 kB]
2.772 Get:5 http://deb.debian.org/debian bookworm-updates/main amd64 Packages [6924 B]
2.809 Get:6 http://deb.debian.org/debian-security bookworm-security/main amd64 Packages [294 kB]
3.874 Fetched 9348 kB in 2s (4256 kB/s)
3.874 Reading package lists...
4.739 Reading package lists...
5.621 Building dependency tree...
5.839 Reading state information...
6.315 curl is already the newest version (7.88.1-10+deb12u14).
6.315 The following NEW packages will be installed:
6.318   build-essential
6.358 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
6.358 Need to get 7704 B of archives.
6.358 After this operation, 20.5 kB of additional disk space will be used.
6.358 Get:1 http://deb.debian.org/debian bookworm/main amd64 build-essential amd64 12.9 [7704 B]
7.008 debconf: delaying package configuration, since apt-utils is not installed
7.157 Fetched 7704 B in 0s (328 kB/s)
7.469 Selecting previously unselected package build-essential.
(Reading database ... 23258 files and directories currently installed.)
8.083 Preparing to unpack .../build-essential_12.9_amd64.deb ...
8.325 Unpacking build-essential (12.9) ...
8.726 Setting up build-essential (12.9) ...
9.463 info: downloading installer
10.22 warn: It looks like you have an existing rustup settings file at:
10.22 warn: /root/.rustup/settings.toml
10.22 warn: Rustup will install the default toolchain as specified in the settings file,
10.22 warn: instead of the one inferred from the default host triple.
10.49 info: profile set to default
10.49 info: default host triple is x86_64-unknown-linux-gnu
10.49 info: syncing channel updates for stable-x86_64-unknown-linux-gnu
11.00 info: latest update on 2026-03-05 for version 1.94.0 (4a4ef493e 2026-03-02)
[+] up 30/32downloading 7 components
 _ Image alpine/socat       Pulled                                                                                                   15.7s
 _ Image postgres:15-trixie Pulled                                                                                                   38.3s
 _ Image minio/minio        Pulled                                                                                                   24.2s
 _ Image config-ente-web    Building                                                                                                 187.6s
 _ Image config-museum      Building                                                                                                 187.6s
Dockerfile:6

--------------------

   5 |     # Install Rust for building ente-wasm

   6 | >>> RUN apt-get update && apt-get install -y curl build-essential && rm -rf /var/lib/apt/lists/* && \

   7 | >>>     curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain stable --target wasm32-unknown-unknown

   8 |     ENV PATH="/root/.cargo/bin:${PATH}"

--------------------

target ente-web: failed to solve: process "/bin/sh -c apt-get update && apt-get install -y curl build-essential && rm -rf /var/lib/apt/lists/* &&     curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain stable --target wasm32-unknown-unknown" did not complete successfully: exit code: 1