[Buildroot] Why can't I make u-boot twice?

[Dan Lyke]

Help!

I have a successful build. I do:

make u-boot-clean
make

and I get

cc     /home/danlyke/code/buildroot/project_build_arm/at91sam9261ek/u-boot-1.2.0-atmel/tools/mkimage.c
-o /home/danlyke/code/buildroot/project_build_arm/at91sam9261ek/u-boot-1.2.0-atmel/tools/mkimage /home/danlyke/code/buildroot/project_build_arm/at91sam9261ek/u-boot-1.2.0-atmel/tools/mkimage.c:61:19:
error: image.h: No such file or directory

followed by gobs of spew and, of course, an error and failure.

Any help?

Thanks.

Dan