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{ python3, fetchPypi, lib, overlay ? (_: _: {}) }:
python3.override {
packageOverrides = lib.composeExtensions
(self: super: {
/*
This overlay can be used whenever we need to override
dependencies specific to the mailman ecosystem: in the past
this was necessary for e.g. psycopg2[1] or sqlalchemy[2].
In such a large ecosystem this sort of issue is expected
to arise again. Since we don't want to clutter the python package-set
itself with version overrides and don't want to change the APIs
in here back and forth every time this comes up (and as a result
force users to change their code accordingly), this overlay
is kept on purpose, even when empty.
[1] 72a14ea563a3f5bf85db659349a533fe75a8b0ce
[2] f931bc81d63f5cfda55ac73d754c87b3fd63b291
*/
django = super.django_3;
# https://gitlab.com/mailman/hyperkitty/-/merge_requests/541
mistune = super.mistune.overridePythonAttrs (old: rec {
version = "2.0.5";
src = fetchPypi {
inherit (old) pname;
inherit version;
hash = "sha256-AkYRPLJJLbh1xr5Wl0p8iTMzvybNkokchfYxUc7gnTQ=";
};
});
})
overlay;
}
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