DE-10 Lite Doesn't Work

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I have tried to use the following example code:

from nmigen import *

from nmigen_boards.de10_lite import *

from nmigen.build import *
from nmigen.vendor.intel import *
from nmigen_boards.upduino_v2 import *

class Blinky(Elaboratable):
    def elaborate(self, platform):
        led   = platform.request("led", 0)
        timer = Signal(20)

        m = Module()
        m.d.sync += timer.eq(timer + 1)
        m.d.comb += led.o.eq(timer[-1])
        return m


if __name__ == "__main__":
    platform = DE10LitePlatform()
    platform.build(Blinky(), do_program=True)

But I get this error:

Traceback (most recent call last):
  File "/run/media/sci4me/ldata/Projects/nmigen-test/test.py", line 22, in <module>
    platform.build(Blinky(), do_program=True)
  File "/usr/lib/python3.9/site-packages/nmigen/build/plat.py", line 78, in build
    plan = self.prepare(elaboratable, name, **kwargs)
  File "/usr/lib/python3.9/site-packages/nmigen/build/plat.py", line 120, in prepare
    fragment._propagate_domains(self.create_missing_domain, platform=self)
  File "/usr/lib/python3.9/site-packages/nmigen/hdl/ir.py", line 380, in _propagate_domains
    new_domains = self._create_missing_domains(missing_domain, platform=platform)
  File "/usr/lib/python3.9/site-packages/nmigen/hdl/ir.py", line 356, in _create_missing_domains
    value = missing_domain(domain_name)
  File "/usr/lib/python3.9/site-packages/nmigen/build/plat.py", line 102, in create_missing_domain
    clk_i = self.request(self.default_clk).i
  File "/usr/lib/python3.9/site-packages/nmigen/build/res.py", line 62, in request
    resource = self.lookup(name, number)
  File "/usr/lib/python3.9/site-packages/nmigen/build/res.py", line 57, in lookup
    raise ResourceError("Resource {}#{} does not exist"
nmigen.build.res.ResourceError: Resource clk50#0 does not exist

Switching to DE-10 Nano, for example, does not have this problem and works just fine.