On Sat, Aug 10 2019, Ricardo Wurmus wrote:
hint: Try upgrading both `python-pycairo' and `gtk+', or remove
one of them from the profile.
Have you tried that?
In particular, I think `guix package -i python-pycairo gtk+` might
do the trick.
Does “guix package -u” not fix this problem for you? Or is this
the output of “guix package -u”?
It looks like `guix package -u` compares the version of the
package, and only updates if the package's version has changed
(and even then, only if it has increased). This means that if a
package's inputs (and thus its store hash) have changed, but its
version has not, the version left in the profile will have
outdated inputs, which can conflict if they are propagated. So
`guix package -u` doesn't fix this problem.
`guix package -i`, on the other hand, just installs whatever it's
told to, so it will install the same package at the same version,
but with updated inputs. Then all the propagated inputs end up
being the same, so there is no conflict.
Carlo
