Error running fnox on alpine (musl)

[heri16]

I get an error when trying to run this on alpine

mise use -g fnox
fnox --version
-bash: /root/.local/share/mise/installs/fnox/1.21.0/fnox: cannot execute: required file not found

[hilja]

Same. fnox doesn't seem to have a musl build.

Root cause is simple.

fnox from mise is a native Linux binary.
That binary wants glibc things. It also wants libudev.so.1.

Your image is alpine.
alpine uses musl, not glibc.

So you have two problems:

1. libudev.so.1 missing
2. glibc symbol __res_init missing

gcompat helps some binaries.
It does not make this fnox binary fully happy.

[hilja]

You can build on debian and switch to alpine as the final image. Live and learn.

# syntax=docker.io/docker/dockerfile-upstream:1.22.0

# Got glibc 👍
FROM node:24.14.0-bookworm-slim AS base
ENV MISE_INSTALL_PATH=/usr/local/bin/mise \
  MISE_VERSION=2026.4.25 \
  MISE_DATA_DIR=/usr/local/share/mise \
  MISE_TRUSTED_CONFIG_PATHS=/usr/src/app \
  PATH=/usr/local/share/mise/shims:/usr/local/share/mise/bin:$PATH \
  MISE_VERBOSE=1
RUN apt-get update \
  && apt-get install --yes --no-install-recommends git openssh-client xz-utils ca-certificates wget \
  && rm -rf /var/lib/apt/lists/* \
  && wget -qO - https://mise.run | sh

# Build in the glibc image, everything should work
FROM base AS build
WORKDIR /usr/src/app
COPY pnpm-lock.yaml pnpm-workspace.yaml mise.toml ./
RUN mise trust --all && mise install
RUN pnpm fetch
COPY . ./
RUN pnpm -F=!lgh install --offline --frozen-lockfile
# FNOX_AGE_KEY comes from BuildKit secret mount so it never lands in an image layer
RUN --mount=type=secret,id=FNOX_AGE_KEY,required=true \
  export FNOX_AGE_KEY="$(cat /run/secrets/FNOX_AGE_KEY)" \
  && mise run //psl:build
RUN pnpm -F=psl deploy --prod /app

# Final layer is Alpine, same small image as before 👍
FROM node:24.14.0-alpine3.22 AS psl
COPY --from=build /app/build /app/build
COPY --from=build /app/node_modules /app/node_modules
WORKDIR /app
CMD ["node", "build/server/index.js"]