maybe(
        http_archive,
        name = "{{ crate_repository(name = crate.name, version = crate.version) }}",
    {%- if attrs | get(key="patch_args", default=Null) %}
        patch_args = [
    {%- for arg in attrs.patch_args %}
            "{{ arg }}",
    {%- endfor %}
        ],
    {%- endif %}
    {%- if attrs | get(key="patch_tool", default=Null) %}
        patch_tool = "{{ attrs.patch_tool }}",
    {%- endif %}
    {%- if attrs | get(key="patches", default=Null) %}
        patches = [
    {%- for patch in attrs.patches %}
            "{{ patch }}",
    {%- endfor %}
        ],
    {%- endif %}
    {%- if attrs | get(key="sha256", default=Null) %}
        sha256 = "{{ attrs.sha256 }}",
    {%- endif %}
        type = "tar.gz",
        urls = ["{{ attrs.url }}"],
        strip_prefix = "{{ crate.name }}-{{ crate.version }}",
        build_file = Label("{{ crate_build_file(name = crate.name, version = crate.version)}}"),
    )