Hi Ludovic, > Could you show the output of “uname -srvo” on this machine? What > distribution does it run? $ uname -srvo Linux 4.4.0-22-generic #40-Ubuntu SMP Thu May 12 22:03:46 UTC 2016 GNU/Linux The base system is Ubuntu 16.04, to which I added the Guix binary distribution 0.10. > Also, from the top-level build directory, could you run: > > ./pre-inst-env strace -f -s 234 -o log \ > guix environment --container --ad-hoc --bootstrap guile-bootstrap \ > -- guile -c '(exit 42)' $ guix environment guix [dev] $ ./pre-inst-env strace -f -s 234 -o log guix environment --container --ad-hoc --bootstrap guile-bootstrap -- guile -c '(exit 42)' guix environment: error: failed to connect to `/usr/local/var/guix/daemon-socket/socket': No such file or directory The log file is attached, but I somehow suspect that the above error message already suggests what's going on - but not to me! Konrad.