Broken with https://github.com/odoo/odoo/commit/23e6dd36d7477f13fe42fdcaae890ffb690d05a4 Indeed CSS guards are used while LESS 1.4.2 only supports mixins guards.
Broken with https://github.com/odoo/odoo/commit/23e6dd36d7477f13fe42fdcaae890ffb690d05a4 Indeed CSS guards are used while LESS 1.4.2 only supports mixins guards.