On Fri, 10 May 2019 18:12:50 -0400 Ivan Vilata i Balaguer <i...@selidor.net> wrote:
> Julien Lepiller (2019-05-10 08:23:22 +0200) wrote: > > > >[…] What I don't get is *why* having two different versions of > > >``python-attrs`` in the profile is considered an error. My > > >understanding was that two different packages in the profile > > >should be able to depend on different versions of the same library > > >without problems, since they are referred by its absolute path in > > >the store so they don't conflict. I understand that I may not > > >directly ``guix install`` two versions of the same package > > >(because the may e.g. put the same entry under > > >``$GUIX_PROFILE/bin``), but in my case ``python-attrs`` is just a > > >dependency package which doesn't show up in ``guix package -I``. > > > > > >Can anybody shed some light on the issue? Thanks! […] Just one more note: Whenever you really NEED to somehow have two versions of the same package installed or two packages with conflicting propagated inputs, a solution is to install them in two different profiles: # Install latest guile in standard profile: $ guix package -i guile # Install older version into different profile: $ guix package --profile=/home/me/test-profile -i guile@2.0 See the manual for details :-) Björn
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