devtools:mkarchroot fails under sudo

[Baho Utot <baho-utot@xxxxxxxxxxxxxxx>]

Following Building in a clean chroot I have encountered the following 
issue, which is related to using sudo mkarchroot
The full path is not included (code posted from mkarchroot) should this 
be fixed?
After patching mkarchroot it works with sudo.

BUILD=/home/devtools

$ sudo mkdir -vp ${BUILD}
mkdir: created directory `/home/devtools'

$ sudo /usr/sbin/mkarchroot "${BUILD}/root" base base-devel sudo
:: Synchronizing package databases...
....
[putolin]
....
/usr/sbin/mkarchroot: line 178: ldconfig: command not found
/usr/sbin/mkarchroot: line 191: chroot: command not found

/usr/sbin/mkarchroot

line 178:
    if [ -d "${working_dir}/lib/modules" ]; then
        ldconfig -r "${working_dir}"
    fi

    if [ -d "${working_dir}/lib/modules" ]; then
        /sbin/ldconfig -r "${working_dir}"
    fi


line 191:
    if [ -e "${working_dir}/etc/locale.gen" ]; then
        echo -e 'en_US.UTF-8 UTF-8\nde_DE.UTF-8 UTF-8' > 
"${working_dir}/etc/locale.gen"
        chroot "${working_dir}" locale-gen

    if [ -e "${working_dir}/etc/locale.gen" ]; then
        echo -e 'en_US.UTF-8 UTF-8\nde_DE.UTF-8 UTF-8' > 
"${working_dir}/etc/locale.gen"
        /usr/sbin/chroot "${working_dir}" /usr/sbin/locale-gen