There should be a cpack (choco pack) tool that is package with Chocolatey. To build the nupkg file, do a cpack in the directory where astyle.nuspec is located. This should generate a astyle-[version].nupkg file.

cpack in root directory

In the same directory as the astyle-[version].nupkg file, execute the following command: choco install astyle -source '%cd%'. This will install the package.

To uninstall the package, simply execute choco uninstall astyle.

Execute the following commands:

• choco install nuget.commandline
• nuget SetApiKey [API_KEY_HERE] -source https://chocolatey.org/
• cpush astyle.[version].nupkg

For more, see https://github.com/chocolatey/chocolatey/wiki/CreatePackagesQuickStart.