Using ARG in my Dockerfile but still getting "Failed to replace env in config" when running my build

Question

I have this file (.npmrc.docker)

//registry.npmjs.org/:_authToken=${NPM_TOKEN}

And in my Docker file I have

ARG NPM_TOKEN
RUN mv .npmrc.docker .npmrc
RUN yarn install

However when I run my Docker build with

NPM_TOKEN=mySecretToken docker build .

I get this error

#41 0.710 error An unexpected error occurred: "Failed to replace env in config: ${NPM_TOKEN}".

What’s the proper way to pass an environment variable into my Docker build?

ale917k · Accepted Answer · 2022-06-08T18:30:30.383

1

docker build --build-arg NPM_TOKEN=mySecretToken . should do the job

edited Jun 08 '22 at 18:30

answered Jun 08 '22 at 18:01

ale917k

1

to complement your answer, here is the [documentation](https://docs.docker.com/engine/reference/commandline/build/#set-build-time-variables---build-arg) – edocollado Jun 08 '22 at 18:27

1 Answers1