Hi Simon, The storm is over and users no longer complain. It seems that all the problems came from a disorder in the NAS permissions. I didn't mention that the home is hosted by a NAS. I guess this disorder disturbed first the sssd and mkhomedir and since guix. I will be careful for the next user. Thank you again  for your efforts and advices. Regards, Fabrice TUDORET Laboratoire du Traitement du Signal et de l'Image INSERM U-1099. Université de Rennes 1 Campus de Beaulieu. Bât 22. 35042. Rennes. France Le 28/10/2024 à 16:52, Simon Tournier a écrit : > Hi, > > Sorry for the late reply. > > On Mon, 14 Oct 2024 at 14:03, Fabrice Tudoret wrote: > >>> c) Display the both derivations, as root and as regular user >>> >>> # guix build -e '(@@ (gnu packages commencement) python-boot0)' -S -d >> [root@cluster24 ~]# guix build -e '(@@ (gnu packages commencement) python-boot0)' -S -d >> /gnu/store/mbnrrqjizy3dvma9i3l8g5yvzi2p04ys-Python-3.5.9.tar.xz.drv >> >>> $ guix build -e '(@@ (gnu packages commencement) python-boot0)' -S -d >> [fmenna@cluster24 ~]$  guix build -e '(@@ (gnu packages commencement) python-boot0)' -S -d >> user with UID 255759 not found >> /gnu/store/mbnrrqjizy3dvma9i3l8g5yvzi2p04ys-Python-3.5.9.tar.xz.drv >> >> I hope the message "user with UID 255759 not found" has nothing to do >> with the issue. > Well, this message comes from the Guix daemon (see nix-daemon.cc file): > > /* Open the store. */ > store = std::shared_ptr(new LocalStore(reserveSpace)); > > if (userId != (uid_t) -1) { > /* Create the user profile. */ > struct passwd *pw = getpwuid(userId); > if (pw != NULL && pw->pw_name != NULL) > store->createUser(pw->pw_name, userId); > else > printMsg(lvlInfo, format("user with UID %1% not found") % userId); > } > > > Hum, that’s not clear for me. The daemon is a beast… Maybe this has an > impact. For sure, aside Guix, I think it would be better to fix it. :-) > > Well, I do not know why but this other message: > > > When I create the user home dir manually, the "guix pull" work's fine. > > So the trouble could come from a disorder with the automatic home dir > > creation. > > > I wish it's the right track. I keep digging. > > spots the light on UID. :-) > > Cheers, > simon >