I left mine running overnight and have gotten a failure in psutil:

psutil> =================================== FAILURES ===================================
psutil> _______________________ TestMemoryAPIs.test_swap_memory ________________________
psutil> 
psutil> self = <psutil.tests.test_system.TestMemoryAPIs testMethod=test_swap_memory>
psutil> 
psutil>     def test_swap_memory(self):
psutil>         mem = psutil.swap_memory()
psutil>         self.assertEqual(
psutil>             mem._fields, ('total', 'used', 'free', 'percent', 'sin', 'sout'))
psutil>     
psutil>         assert mem.total >= 0, mem
psutil>         assert mem.used >= 0, mem
psutil>         if mem.total > 0:
psutil>             # likely a system with no swap partition
psutil> >           assert mem.free > 0, mem
psutil> E           AssertionError: sswap(total=8204054528, used=8204054528, free=0, percent=100.0, sin=35428151296, sout=75186987008)
psutil> E           assert 0 > 0
psutil> E            +  where 0 = sswap(total=8204054528, used=8204054528, free=0, percent=100.0, sin=35428151296, sout=75186987008).free
psutil> 
psutil> /nix/store/f43p2hab6y6hqqmlnyp6c61cx2kslifx-python3.10-psutil-5.9.5/lib/python3.10/site-packages/psutil/tests/test_system.py:298: AssertionError
psutil> =========================== short test summary info ============================
psutil> FAILED ../../nix/store/f43p2hab6y6hqqmlnyp6c61cx2kslifx-python3.10-psutil-5.9.5/lib/python3.10/site-packages/psutil/tests/test_system.py::TestMemoryAPIs::test_swap_memory - AssertionError: sswap(total=8204054528, used=8204054528, free=0, percent=10...
psutil> ============ 1 failed, 26 passed, 1 skipped, 16 deselected in 0.63s ============
psutil> /nix/store/ld7x5as7sc5sbzmhzh6s6s9jfksil1h4-stdenv-linux/setup: line 1596: pop_var_context: head of shell_variables not a function context
error: builder for '/nix/store/24sg1zbm3wq2h8nv68jivynlmhmllnb9-python3.10-psutil-5.9.5.drv' failed with exit code 1;

This is quite possibly a bug in psutil's test suite where it fails when at 100% swap usage.

In reply to @artemis:arty.chat
implr: to confirm, is that error log i linked above showing a failure on the same test yours fails on?

In reply to @implr:hackerspace.pl
and it actually fails on native (sufficiently new) nixpkgs for me as well, so the problem is just coreutils9.3, not riscv/cross compile related

raitobezarius: I've been doing some testing of the above on aarch64-darwin. I found that plain pkgsLLVM.stdenv doesn't build on master, I get a silent failure in compiler-rt. NIX_DEBUG exposes the issue that preConfigure is trying to set CMAKE_LIPO=$(command -v aarch64-apple-darwin-lipo) but this goes straight to the exit/failure handler.

Is pkgsLLVM known (meant?) to work on this platform? Is there a darwin platform it works on?