how to set umask

[volkansucu]

Hi, I am a ubuntu newbie.

After following steps

ubuntu@ubuntu:$ cd freetz-devel
ubuntu@ubuntu:/freetz-devel$ make tools

I got this error message
Wrong build directory permissions. Please set umask to 0022 and then unpack/checkout again in a directory having no uid-/gid-bits set. Schluss.

I was not able to find a solution by google. I tried to set umask 0022 by just entering umask 0022. The response when just enter umask is 0022.

Trying again make tools is leading to same error message.

Any idea how to umask correct?