Iâve created a new repository and chose to use tonel for its file format. But as in my previous attempts I cannot make it work. I test my repo with travis for pharo 6.1 and pharo 7. Using SmalltalkCISpec { #loading : [ SCIMetacelloLoadSpec { #baseline : 'ArangoDB', #directory : 'source', #load : [ 'Tests' ], #platforms : [ #pharo ] } ] } it succeeds in pharo7 and fails in pharo 6.1. I think this is because 6.1 cannot handle tonel. But using SmalltalkCISpec { #loading : [ SCIMetacelloLoadSpec { #baseline : 'ArangoDB', #directory : 'source', #load : [ 'Tests' ], #useLatestMetacello: true, #platforms : [ #pharo ] } ] } makes it fail in pharo 7 as well. Loaded -> BaselineOfMetacello-CompatibleUserName.1526690791 --- https://github.com/Metacello/metacello.git[master] --- https://github.com/Metacello/metacello.git[master] <>Loading baseline of BaselineOfMetacello...MetacelloNameNotDefinedError: project group, or package named: 'FileTree' not found when used in requires: or includes: field of package: 'Metacello-FileTree' for version: baseline of BaselineOfMetacello. <>[ MetacelloNameNotDefinedError <> signal: <> 'project group, or package named: ' , specName printString <> , ' not found when used in requires: or includes: field of package: ' <> , self name printString , ' for version: ' <> , aVersionSpec versionString , ' of ' , aVersionSpec projectLabel <> , '.'. <>nil "return nil if resumed" ] in [ :specName | Any ideas? Norbert