"Untarring downloaded ISO" fails with permission denied

[airblade]

I'm on OS X 10.6.8. tar --version gives bsdtar 2.6.2 - libarchive 2.6.2.

I modified build.sh as per PR #11, i.e. to download 12.04.1 instead of 12.04.

build.sh failed like this:

$ ./build.sh 
Cleaning build directory ...
Downloading ubuntu-12.04.1-alternate-amd64.iso ...
Creating Custom ISO
Untarring downloaded ISO ...
dists/precise/main/binary-i386/Packages.gz: Can't create 'dists/precise/main/binary-i386/Packages.gz': Permission denied
dists/precise/restricted/debian-installer/binary-amd64/Packages.gz: Can't create 'dists/precise/restricted/debian-installer/binary-amd64/Packages.gz': Permission denied
dists/precise/restricted/binary-amd64/Packages.gz: Can't create 'dists/precise/restricted/binary-amd64/Packages.gz': Permission denied
install/netboot/ubuntu-installer/amd64/linux: Can't create 'install/netboot/ubuntu-installer/amd64/linux': Permission denied
tar: Error exit delayed from previous errors.

Any ideas?

[mateusprado21]

echo "# teste" >> README.md

git init
git add README.md
git commit -m "primeiro commit"
git branch -M principal
git remoto adicionar origem https://github.com/mateusprado21/test.git
git push - sua origem principal