Some kind of dependency failure with make clean and qemu: $ make -C tools clean [...] make[1]: Warning: File `/home/gdunlap/hg/open-source/xen-upstream.hg/tools/../Config.mk'' has modification time 49 s in the future set -e; if test -d qemu-xen-traditional-dir/.; then \ make -C qemu-xen-traditional-dir clean; \ fi make[2]: Entering directory `/home/gdunlap/hg/open-source/xen-upstream.hg/tools/qemu-xen-traditional-dir-remote'' Makefile:3: config-host.mak: No such file or directory Makefile:4: /rules.mak: No such file or directory make[2]: *** No rule to make target `/rules.mak''. Stop. make[2]: Leaving directory `/home/gdunlap/hg/open-source/xen-upstream.hg/tools/qemu-xen-traditional-dir-remote'' make[1]: *** [subdir-clean-qemu-xen-traditional-dir] Error 2 make[1]: Leaving directory `/home/gdunlap/hg/open-source/xen-upstream.hg/tools'' make: *** [subdirs-clean] Error 2 make: Leaving directory `/home/gdunlap/hg/open-source/xen-upstream.hg/tools''