option('system-wide', type : 'boolean', value : true, description : 'Install system-wide rather than isolated inside a Python environment' ) option('code-only', type : 'boolean', value : false, description : 'Do not install additional files such as configuration or documentation' ) option('eprefix', type : 'string', description : 'Prefix directory for Portage to operate under' ) option('portage-base', type : 'string', description : 'Portage installation base directory' ) option('portage-bindir', type : 'string', description : 'Internal Portage executables directory' ) option('portage-datadir', type : 'string', description : 'Data files directory' ) option('docdir', type : 'string', description : 'Documentation directory' ) option('doc', type : 'boolean', value : false, description : 'Build and install documentation' ) option('doc-formats', type : 'array', choices : ['xhtml', 'xhtml-nochunks'], description : 'Documentation formats to build' ) option('apidoc', type : 'boolean', value : false, description : 'Build and install API documentation' ) option('native-extensions', type : 'boolean', value : true, description : 'Build and install the native extensions for better performance' ) option('gentoo-dev', type : 'boolean', value : false, description : 'Enable features required for Gentoo ebuild development' ) option('ipc', type : 'boolean', value : true, description : 'Use inter-process communication between Portage and running ebuilds' ) option('rsync-verify', type : 'boolean', value : true, description : 'Enable full-tree cryptographic verification of Gentoo repository rsync checkouts' ) option('xattr', type : 'boolean', value : false, description : 'Preserve extended attributes when installing files' )