00:00 -
00:07 guix package --list-generations     #1
00:20 guix package --roll-back
00:31 guix package --list-generations (4) #2
00:54 guix package --switch-generation=2
01:10 guix package --list-generations (2) #3
01:20 guix package --switch-generation=5
01:31 done 07