What version of Turborepo are you using?

1.0.28

What package manager are you using / does the bug impact?

Yarn v1

What operating system are you using?

Windows

Describe the Bug

When truing to prune specific scope during docker build process operation fails with:

ERROR Could not construct graph: yarn.lock: could not unmarshal lockfile: yaml: line 6: mapping values are not allowed in this context

Dockerfile:

FROM node:alpine AS base
RUN apk update
WORKDIR /app

FROM base AS pruner
WORKDIR /app
RUN yarn global add turbo@1.0.28
COPY . .
RUN turbo prune --scope=web --docker

Potentially related to #471

Expected Behavior

Prunning should work as expected.

To Reproduce

• Setup a boilerplate project using Yarn on Windows => npm create-turbo@latest
  • Install Docker (if none)
• Create Dockerfile in respective folder => ./apps/web
• Delete node_modules everywhere (or ignore them in .dockerignore)
• Try building it from repo root using docker build . -f apps/web/Dockerfile -t turbo-web-docker