Danny Milosavljevic skribis: >> After processing options, guix need to "expanduser()" (as it is called >> in Python) on all arguments which are paths. > > Please don't do it. > > UNIX has its warts, and this is a well-known one (use ${HOME} instead). Seconded. Tilde expansion is performed by the shell. In the case of ‘--foo=~/bar’, tilde expansion does not happen because ~ is right in the middle of a string. It’s admittedly annoying, but it’s not something Guix itself should paper over. Doing that would open a can of worms, as illustrated by the example Tobias gave. Ludo’.