In some cases the build system tried to build main.c before copying the various "shipped" files (lex/yacc output) where the place the compiler expects them. Make the dependency explicit. Change-Id: Iacef5292aadb9fe7bc967aa4ab5ee6c9fe4df3d7 Signed-off-by: Patrick Georgi <patrick@georgi-clan.de> Reviewed-on: http://review.coreboot.org/5510 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>