option('pam', type: 'feature', value: 'auto', description: 'Use PAM instead of shadow')
option('gdk-pixbuf', type: 'feature', value: 'auto', description: 'Enable support for more image formats')
option('man-pages', type: 'feature', value: 'auto', description: 'Generate and install man pages')
option('zsh-completions', type: 'boolean', value: true, description: 'Install zsh shell completions')
option('bash-completions', type: 'boolean', value: true, description: 'Install bash shell completions')
option('fish-completions', type: 'boolean', value: true, description: 'Install fish shell completions')