Hi Beman. Would it be ok to add an 'import generate ;' statement to the main Boost library Jamroot file (see the attached patch)? That is the module where the 'generate' rule used in that file is defined. Although not strictly necessary this does not change anything for the build but will avoid breaking the build once we remove some extra module imports in Boost Build. I already committed the same change to the trunk. Best regards, Jurko Gospodnetić Index: Jamroot =================================================================== --- Jamroot (revision 47611) +++ Jamroot (working copy) @@ -98,6 +98,7 @@ # - handle boost version # - handle python options such as pydebug +import generate ; import modules ; import set ; import stage ;