errors building xdev

[draymond at FoxValley.net]

I keep getting the following error while compiling xdev (so that I can  
run crochet):

cd /usr/src/include/../sys/dev/acpica;  sh /usr/src/tools/install.sh  
-C -o root -g wheel -m 444 acpiio.h   
//usr/armv6-freebsd/usr/include/dev/acpica
sh /usr/src/tools/install.sh -C -o root -g wheel -m 444 acpi_hpet.h   
//usr/armv6-freebsd/usr/include/dev/acpica
install: acpi_hpet.h: No such file or directory
*** Error code 71

My build command is as follows:

cd /usr/src && make XDEV=arm XDEV_ARCH=armv6 WITH_GCC=1  
WITH_GCC_BOOTSTRAP=1 WITHOUT_CLANG=1 WITHOUT_CLANG_BOOTSTRAP=1  
WITHOUT_CLANG_IS_CC=1 xdev

Any idea what might be wrong?