I am using the following command to do it: sudo apt-get update && sudo apt-get install yarn. “remark-preset-lint-recommended”: “^5.0.0”, 2:46:15 PM: npm WARN <@>material-ui/system<@>4.9.14 requires a peer of react-dom<@>^16.8.0 but none is installed. 2:46:15 PM: added 1943 packages from 896 contributors, updated 1 package and audited 1953 packages in 66.716s Paste the path to NPM folder in your AppData. With some research on similar issue I found that is probably a PATH issue and I tried multiple fix but it doesn't work... Because if I run "rails s" or "bundle exec rails s" or "yarn" in a normal terminal (or the embeded terminal in bottom of jetbrains IDE) there is no issues, but with the navbar it doesn't work. “fix”: “./scripts/lint.sh --fix” yarn run. “hooks”: { 2:44:59 PM: Different publish path detected, going to use the one specified in the Netlify configuration file: ‘client/build’ versus ‘’ in the Netlify UI 2:44:59 PM: Different build dir detected, going to use the one specified in the Netlify configuration file: ‘client’ versus ‘’ in the Netlify UI 2:46:15 PM: npm WARN <@>material-ui/system<@>4.9.14 requires a peer of react<@>^16.8.0 but none is installed. I’m not sure why yarn build command is the problem, but it works fine on my local terminal and that’s the command I use normally. Click OK for all windows and you are done. 2:46:15 PM: npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents<@>^2.1.3 (node_modules/react-scripts/node_modules/fsevents): 2:45:09 PM: npm WARN deprecated <@>types/date-fns<@>2.6.0: This is a stub types definition for date-fns date-fns provides its own type definitions, so you don’t need <@>types/date-fns installed! It says yarn: command not found, Command failed with exit code 127: yarn build. Explorer context menu. 2:46:20 PM: Started saving go dependencies 2:46:20 PM: Error location axios provides its own type definitions, so you don’t need <@>types/axios installed! 2:46:12 PM: > core-js<@>2.6.12 postinstall /opt/build/repo/client/node_modules/babel-runtime/node_modules/core-js 2:46:20 PM: Finished saving build plugins 2:45:28 PM: npm WARN deprecated har-validator<@>5.1.5: this library is no longer supported Enter any yarn command you want. Press Win + R 2. Basically normally doing Ruby, I have to use Rails for a project, and face, again, the same kind of weird path issue (I say path cos' it's probably that...). Proceeding with the specified command: ‘git diff --quiet HEAD^ HEAD .’ “author”:"" “eslint-config-prettier”: “^6.15.0”, Project structure: yarn don’t have yarn.lock per workspce - it have just one in root directory of project, { 2:46:20 PM: Failed during stage ‘building site’: Build script returned non-zero exit code: 2 2:46:20 PM: <@>netlify/build 5.4.0 2:46:15 PM: npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents<@>2.2.1: wanted {“os”:“darwin”,“arch”:“any”} (current: {“os”:“linux”,“arch”:“x64”}) Press N to open environment variables. “eslint-plugin-prettier”: “^3.1.4”, OS: Windows 10 (1511 build 10586.164) Node: v6.5.0 Does anything changed between 10AM and 12PM - last success build on the same pipelines config was at 10:20AM You must install peer dependencies yourself. “workspaces”: [ “typescript”: “4.0.5” You must install peer dependencies yourself. 2:45:17 PM: npm WARN deprecated chokidar<@>2.1.8: Chokidar 2 will break on node v14+. npm v2. } Once you've followed the instructions (running yarn --version from your home directory should yield something like 1.22.0), go to the next section to see how to actually enable Yarn 2 on your project.. You've probably remarked the global Yarn is from the "Classic" line (1.x). This is described in issue yarnpkg#904 . yarn run env. But everything works as expected from the IDE's terminal. yarn publish [tag] yarn run