Cyanogenmod 12 mkvendor.sh problem

Hi guys i have a question, i want to get my device tree with the mkvendor.sh on the cyanogenmod source build/tools/device folder, y run this line using the previusly boot.img extracted:

./build/tools/device/mkvendor.sh dell yellowtail ~/boot.img

But the problem is that that some files are missing, i got this:

Code:

---


Arguments: dell yellowtail /home/quevon24/boot.img
Output will be in /home/quevon24/android/system/cm12/device/dell/yellowtail
gzip: ../boot.img-ramdisk.gz: No such file or directory
cpio: premature end of archive
cat: /tmp/quevon24/bootimg/boot.img-base: No such file or directory
cat: /tmp/quevon24/bootimg/boot.img-cmdline: No such file or directory
cat: /tmp/quevon24/bootimg/boot.img-pagesize: No such file or directory
cp: cannot stat
«/tmp/quevon24/bootimg/boot.img-zImage»: No such file or directory
Creating initial git repository.
~/android/system/cm12/device/dell/yellowtail ~/android/system/cm12
Reinitialized existing Git repository in /home/quevon24/android/system/cm12/device/dell/yellowtail/.git/
On master branch
nothing to commit, working directory clean
~/android/system/cm12
Done!

---

My boot.img is from a dell venue 8 3830, its from a android 4.4 stock image from here: http://forum.xda-developers.com/show...40&postcount=2

Anyone can help and explain me please?

Thanks