pythonPackages.cartopy: fix tests for python2.7 using xvfb #60948
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Motivation for this change
Draft PR because this sits on top of #60936Python 2.7's tk is over-eager in trying to open an x display, so run the tests in
xvfb
.xvfb
is quite a heavy dependency (albeit only a build-time one), so ensure this is only used when needed.Things done
sandbox
innix.conf
on non-NixOS)nix-shell -p nix-review --run "nix-review wip"
./result/bin/
)nix path-info -S
before and after)