Important: This documentation covers Yarn 2. For 1.x docs, see
yarn addyarn binyarn cache cleanyarn config getyarn config setyarn configyarn constraints queryyarn constraints sourceyarn constraintsyarn dlxyarn execyarn inityarn installyarn linkyarn nodeyarn npm infoyarn npm loginyarn npm publishyarn npm whoamiyarn packyarn patch-commityarn patchyarn plugin import from sourcesyarn plugin importyarn plugin listyarn plugin runtimeyarn rebuildyarn removeyarn runyarn set resolutionyarn set version from sourcesyarn set versionyarn stageyarn unplugyarn upyarn upgrade-interactiveyarn version applyyarn version checkyarn versionyarn whyyarn workspaceyarn workspaces focusyarn workspaces foreachyarn workspaces list

yarn constraints


To use this command, first install the constraints plugin: yarn plugin import constraints

Check that the project constraints are met.


$> yarn constraints [--fix]


Check that all constraints are satisfied :

yarn constraints

Autofix all unmet constraints :

yarn constraints --fix


This command will run constraints on your project and emit errors for each one that is found but isn't met. If any error is emitted the process will exit with a non-zero exit code.

If the --fix flag is used, Yarn will attempt to automatically fix the issues the best it can, following a multi-pass process (with a maximum of 10 iterations). Some ambiguous patterns cannot be autofixed, in which case you'll have to manually specify the right resolution.

For more information as to how to write constraints, please consult our dedicated page on our website: