[Pharo-project] How can I load metacello without OB

HI guys Gofer new squeaksource: 'PharoTaskForces'; package: 'ConfigurationOfRPackage'; load ConfigurationOfRPackage project load: #default I thought that default would only load core since there is package: 'Metacello-Core' with: [ spec includes: #('Metacello-MC' 'Metacello-Platform' ). ]; package: 'Metacello-MC' with: [ spec requires: #('Metacello-Core' 'Gofer Core' ). ]; package: 'Metacello-Platform' with: [ spec requires: #('Metacello-MC' ). ]; spec group: 'default' with: #('Metacello-Core' ); but it loads OB so I'm confused. And stuck because OB does not load in 1.2 so I lost one hour...... boring. Stef