$ git clone https://git.libre-soc.org/git/dev-env-setup.git
$ cd dev-env-setup
$ sudo bash
+ (optional: # export CHROOT_DEBIAN_MIRROR=http://ftp.<mirror>.debian.org/debian)
# ./mk-deb-chroot libresoc
# ./cp-scripts-to-chroot libresoc # copies dev-env-setup to chroot
# exit