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bug#35751: "guix environment -s" doesn't set %current-system in gnu/pack
bug#35751: "guix environment -s" doesn't set %current-system in gnu/packages
Sat, 18 May 2019 19:19:40 +0200
Gnus/5.13 (Gnus v5.13) Emacs/26.2 (gnu/linux)
Danny Milosavljevic <address@hidden> skribis:
> when doing "guix environment -s armhf-linux", apparently it doesn't set
> %current-system to "armhf-linux" for packages in gnu/packages at toplevel
Correct. That’s the way it’s meant to work: the initial value of
‘%current-system’ when files get loaded should not matter.
> That would be convenient for development, f.e. instead of "guix build" I often
> use "guix environment" inside the git checkout of the package. In this case
> it's differing.
Package definitions should refer to ‘%current-system’ only from within
the dynamic extent of a thunked field.
For example, if a package refers to ‘%current-system’ from ‘arguments’,
or from a procedure called from ‘arguments’, everything is fine:
‘%current-system’, at that point, will be bound to whatever was selected
Does that make sense?