cargo-geiger: fix some tests

    # curl-sys wants to run curl-config on darwin

    ++ lib.optionals stdenv.hostPlatform.isDarwin [ curl.dev ];

  # skip tests with networking or other failures

  preCheck = ''

    export HOME=$(mktemp -d)

  '';

  checkFlags = [

    "--skip serialize_test1_quick_report"

    # panics

    "--skip serialize_test2_quick_report"

    "--skip serialize_test3_quick_report"

    "--skip serialize_test4_quick_report"

    "--skip serialize_test6_quick_report"

    "--skip serialize_test7_quick_report"

    "--skip serialize_test1_report"

    "--skip serialize_test2_report"

    "--skip serialize_test3_report"

    "--skip serialize_test4_report"

    "--skip serialize_test6_report"

    "--skip serialize_test7_report"

    # multiple test cases that time-out or cause memory leaks

    "--skip test_package"

    # requires networking

    "--skip test_package::case_2"

    "--skip test_package::case_3"

    "--skip test_package::case_6"

    "--skip test_package::case_9"

    # panics, snapshot assertions fails

    "--skip test_package_update_readme::case_2"

    "--skip test_package_update_readme::case_3"

    "--skip test_package_update_readme::case_5"