Hi, when I try "b2 headers" on a fresh checkout of the develop branch, I get the following errors: C:/boost/tools/build/src/build\feature.jam:326: in validate-feature from module feature error: unknown feature "<segmented-stacks>" C:/boost/tools/build/src/build\feature.jam:360: in expand-subfeatures-aux from module feature C:/boost/tools/build/src/build\feature.jam:425: in feature.expand-subfeatures from module feature C:/boost/tools/build/src/build\property.jam:508: in property.translate from module property C:/boost/tools/build/src/build\property-set.jam:432: in property-set.create-from-user-input from module property-set C:/boost/tools/build/src/build\property-set.jam:484: in property-set.refine-from-user-input from module property-set C:/boost/tools/build/src/build\project.jam:700: in class@project-attributes.set from module object(project-attributes)@369 C:/boost/tools/build/src/build\project.jam:1099: in project from module project-rules libs\coroutine2\build\Jamfile.v2:26: in modules.load from module Jamfile<C:\boost\libs\coroutine2\build> C:/boost/tools/build/src/build\project.jam:325: in load-jamfile from module project C:/boost/tools/build/src/build\project.jam:64: in load from module project C:/boost/tools/build/src/build\project.jam:89: in load-used-projects from module project C:/boost/tools/build/src/build\project.jam:75: in load from module project C:/boost/tools/build/src/build\project.jam:145: in project.find from module project C:/boost/tools/build/src\build-system.jam:535: in load from module build-system C:\boost\tools\build\src/kernel\modules.jam:295: in import from module modules C:\boost\tools\build\src/kernel/bootstrap.jam:139: in boost-build from module C:\boost\boost-build.jam:17: in module scope from module Does anyone know what's wrong here? Thanks, Marcel -- View this message in context: http://boost.2283326.n4.nabble.com/b2-headers-failing-tp4680039.html Sent from the Boost - Dev mailing list archive at Nabble.com.