{ python3 }: python3.override { packageOverrides = self: super: { # does not find tests alembic = super.alembic.overridePythonAttrs (oldAttrs: { doCheck = false; }); # Fixes `AssertionError: database connection isn't set to UTC` psycopg2 = super.psycopg2.overridePythonAttrs (a: (rec { version = "2.8.6"; src = super.fetchPypi { inherit version; inherit (a) pname; sha256 = "fb23f6c71107c37fd667cb4ea363ddeb936b348bbd6449278eb92c189699f543"; }; })); }; }