In recent versions of Grails install-plugin command has been deprecated. What is now the recommended way of installing a plugin that is not available via some repository. As
I don't know if it is the correct way but we get it working:
BuildConfig.groovy file to point to the new pluginExample: Download webflow.zip plugin and unzip it into a plugins directory within your project. Add this line at end of your BuildConfig file
grails.plugin.location."webflow" = "plugins/webflow"