Error while building with man pages

[Alie Tan]

Hi,

I got this error while build FreeBSD ARMv6 for R-PI

gzip -cn /usr/src/sys/boot/arm/uboot/../../forth/beastie.4th.8 >
beastie.4th.8.gz
gzip -cn /usr/src/sys/boot/arm/uboot/../../forth/brand.4th.8 >
brand.4th.8.gz
gzip -cn /usr/src/sys/boot/arm/uboot/../../forth/check-password.4th.8 >
check-password.4th.8.gz
gzip -cn /usr/src/sys/boot/arm/uboot/../../forth/color.4th.8 >
color.4th.8.gz
gzip -cn /usr/src/sys/boot/arm/uboot/../../forth/delay.4th.8 >
delay.4th.8.gz
gzip -cn /usr/src/sys/boot/arm/uboot/../../forth/loader.conf.5 >
loader.conf.5.gz
gzip -cn /usr/src/sys/boot/arm/uboot/../../forth/loader.4th.8 >
loader.4th.8.gz
gzip -cn /usr/src/sys/boot/arm/uboot/../../forth/menu.4th.8 > menu.4th.8.gz
gzip -cn /usr/src/sys/boot/arm/uboot/../../forth/menusets.4th.8 >
menusets.4th.8.gz
gzip -cn /usr/src/sys/boot/arm/uboot/../../forth/version.4th.8 >
version.4th.8.gz
gzip -cn /usr/src/sys/boot/arm/uboot/../../common/loader.8 > loader.8.gz
cat /usr/src/sys/boot/arm/uboot/../../common/help.common
/usr/src/sys/boot/arm/uboot/help.uboot |  awk -f
/usr/src/sys/boot/arm/uboot/../../common/merge_help.awk > loader.help
tar: Error opening archive: Unrecognized archive format