I install the SliTaz 4.0 on a USB key with success. I boot my system from this USB key. After I install the gcc-4.5.2 using the command line: tazpkg get-install gcc-4.5.2. I was able to do a HelloWord.c, compile and execute with success. I want to update my USB key to keep this install package on my image. To do this I use the command line: tazusb writefs gzip. It was done with success. I reboot my system, but the gcc compiler is not in my system anymore. I read a lot of documentation on this topic on this site but I do not understand why it is not working. Is somebody could help me?