When running snyk protect, the CLI downloads relevant patches and applies them using the patch executable. If this file is not found, the following error message is shown:
Snyk couldn't patch the specified vulnerabilities because GNU's patch is not available. Please install 'patch' and try again.

On a Windows machine, we recommend using https://git-scm.com/download to install the needed files. Make sure to have your %PATH% environment variable include the location of the installed patch.exe (the default path is C:\Program Files\Git\usr\bin ). You can verify the proper installation by running patch -v . Once you see the proper output, you are good to go with snyk protect !