these 3 derivations will be built:
  /nix/store/2xiyg26ama8s0585lracfmwxpl0imhsw-source.drv
  /nix/store/zrsxmkwgdhv7ss4n4i5llvkzfspcfd0d-mcptoon-0.8.1.drv
  /nix/store/0llr70sv4zl8cdk1z9b5hyjksw0x4nkr-check-mcptoon.drv
error: build of '/nix/store/zrsxmkwgdhv7ss4n4i5llvkzfspcfd0d-mcptoon-0.8.1.drv' on 'grpc://farm.numtide.com:50051?client-cert=/run/secrets/vars/per-machine/bld1/nix-farm-ci/crt&client-key=/run/secrets/vars/per-machine/bld1/nix-farm-ci/key&connect-timeout=20&system=aarch64-linux' failed: Cannot build '/nix/store/zrsxmkwgdhv7ss4n4i5llvkzfspcfd0d-mcptoon-0.8.1.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/95lcm3a5m6bka275fnsj1blzavvwaqms-mcptoon-0.8.1-dist
         /nix/store/9xsn6p6ma1v8yz5wgkh3ipfygkwrq994-mcptoon-0.8.1
       Last 25 log lines:
       > E       + PROCESS_DIED
       >
       > tests/test_demo_dead_package.py:86: AssertionError
       > ____________ TestStdioResponsePump.test_eof_wakes_waiter_fail_fast _____________
       >
       > self = <tests.test_v074_stdio_timeout.TestStdioResponsePump testMethod=test_eof_wakes_waiter_fail_fast>
       >
       >     def test_eof_wakes_waiter_fail_fast(self):
       >         """Server dies after first request → EOF sentinel wakes the queue
       >         waiter → PROCESS_DIED immediately (not the full timeout)."""
       >         client = MCPClient(stdio=[PY, self.dier], timeout=30)
       >         t0 = time.time()
       >         with self.assertRaises(MCPError) as cm:
       >             client.initialize()
       >         elapsed = time.time() - t0
       > >       self.assertEqual(cm.exception.code, "PROCESS_DIED")
       > E       AssertionError: 'RESPONSE_TIMEOUT' != 'PROCESS_DIED'
       > E       - RESPONSE_TIMEOUT
       > E       + PROCESS_DIED
       >
       > tests/test_v074_stdio_timeout.py:217: AssertionError
       > =========================== short test summary info ============================
       > FAILED tests/test_demo_dead_package.py::TestDeadServerStderrSurfaces::test_process_died_includes_stderr - AssertionError: 'RESPONSE_TIMEOUT' != 'PROCESS_DIED'
       > FAILED tests/test_v074_stdio_timeout.py::TestStdioResponsePump::test_eof_wakes_waiter_fail_fast - AssertionError: 'RESPONSE_TIMEOUT' != 'PROCESS_DIED'
       > ===== 2 failed, 1464 passed, 3 skipped, 3 deselected in 125.38s (0:02:05) ======
       For full logs, run:
         nix log /nix/store/zrsxmkwgdhv7ss4n4i5llvkzfspcfd0d-mcptoon-0.8.1.drv
error: Cannot build '/nix/store/zrsxmkwgdhv7ss4n4i5llvkzfspcfd0d-mcptoon-0.8.1.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/95lcm3a5m6bka275fnsj1blzavvwaqms-mcptoon-0.8.1-dist
         /nix/store/9xsn6p6ma1v8yz5wgkh3ipfygkwrq994-mcptoon-0.8.1
error: Cannot build '/nix/store/0llr70sv4zl8cdk1z9b5hyjksw0x4nkr-check-mcptoon.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/7l1zm0w18i535a9sc2ppsbadc3z3j3l1-check-mcptoon