python3Packages.watchdog: fd release tests failing (on non-nixos?)

[Sigmanificient]

Nixpkgs version

• Staging

Describe the bug

I was trying to build a package on my vps, which runs on Debian, Fd related tests seems to be failing. This may be only on non-nixos system?

• nix-build -A python3Packages.watchdog

watchdog> =================================== FAILURES ===================================
watchdog> ________________________________ test_select_fd ________________________________
watchdog> 
watchdog> p = <bound method Helper.joinpath of Helper(tmp='/build/pytest-of-nixbld/pytest-0/test_select_fd0', emitters=[], event_queue=<queue.Queue object at 0x7ffff54d1d00>)>
watchdog> event_queue = <queue.Queue object at 0x7ffff54d1d00>
watchdog> start_watching = <bound method Helper.start_watching of Helper(tmp='/build/pytest-of-nixbld/pytest-0/test_select_fd0', emitters=[], event_queue=<queue.Queue object at 0x7ffff54d1d00>)>
watchdog> 
watchdog>     def test_select_fd(p: P, event_queue: TestEventQueue, start_watching: StartWatching) -> None:
watchdog>         # We open a file 2048 times to ensure that we exhaust 1024 file
watchdog>         # descriptors, the limit of a select() call.
watchdog>         path = p("new_file")
watchdog>         with open(path, "a"):
watchdog>             pass
watchdog>         with ExitStack() as stack:
watchdog>             for _i in range(2048):
watchdog> >               stack.enter_context(open(path))
watchdog>                                     ^^^^^^^^^^
watchdog> E               OSError: [Errno 24] Too many open files: '/build/pytest-of-nixbld/pytest-0/test_select_fd0/new_file'
watchdog> 
watchdog> _i         = 1013
watchdog> event_queue = <queue.Queue object at 0x7ffff54d1d00>
watchdog> p          = <bound method Helper.joinpath of Helper(tmp='/build/pytest-of-nixbld/pytest-0/test_select_fd0', emitters=[], event_queue=<queue.Queue object at 0x7ffff54d1d00>)>
watchdog> path       = '/build/pytest-of-nixbld/pytest-0/test_select_fd0/new_file'
watchdog> stack      = <contextlib.ExitStack object at 0x7ffff577bfc0>
watchdog> start_watching = <bound method Helper.start_watching of Helper(tmp='/build/pytest-of-nixbld/pytest-0/test_select_fd0', emitters=[], event_queue=<queue.Queue object at 0x7ffff54d1d00>)>
watchdog> 
watchdog> tests/test_inotify_c.py:202: OSError
watchdog> ===Flaky Test Report===
watchdog> 
watchdog> test_auto_restart_subprocess_termination[True] passed 1 out of the required 1 times. Success!
watchdog> test_auto_restart_subprocess_termination[False] passed 1 out of the required 1 times. Success!
watchdog> test_delayed_get passed 1 out of the required 1 times. Success!
watchdog> test_nondelayed_get passed 1 out of the required 1 times. Success!
watchdog> test_create passed 1 out of the required 1 times. Success!
watchdog> test_delete passed 1 out of the required 1 times. Success!
watchdog> test_modify passed 1 out of the required 1 times. Success!
watchdog> test_chmod passed 1 out of the required 1 times. Success!
watchdog> test_move passed 1 out of the required 1 times. Success!
watchdog> test_case_change passed 1 out of the required 1 times. Success!
watchdog> test_move_to passed 1 out of the required 1 times. Success!
watchdog> test_move_from passed 1 out of the required 1 times. Success!
watchdog> test_separate_consecutive_moves passed 1 out of the required 1 times. Success!
watchdog> test_delete_self passed 1 out of the required 1 times. Success!
watchdog> test_passing_unicode_should_give_unicode passed 1 out of the required 1 times. Success!
watchdog> test_recursive_on passed 1 out of the required 1 times. Success!
watchdog> test_recursive_off passed 1 out of the required 1 times. Success!
watchdog> test_renaming_top_level_directory passed 1 out of the required 1 times. Success!
watchdog> test_file_lifecyle passed 1 out of the required 1 times. Success!
watchdog> 
watchdog> ===End Flaky Test Report===
watchdog> =========================== short test summary info ============================
watchdog> FAILED tests/test_inotify_c.py::test_select_fd - OSError: [Errno 24] Too many open files: '/build/pytest-of-nixbld/pytest-0/test_select_fd0/new_file'
watchdog> =========== 1 failed, 160 passed, 5 skipped, 3 deselected in 55.96s ============
error: builder for '/nix/store/h0y3329l8vbq06bggxa58wv5rgsbk7vd-python3.13-watchdog-6.0.0.drv' failed with exit code 1
error: 1 dependencies of derivation '/nix/store/fzz4wpx9fgsnlcapf9xq9gnx5a9zv5g4-python3.13-werkzeug-3.1.4.drv' failed to build
boost> building '/nix/store/ddba841169p8r2x8adip8b56k78760sy-boost-1.87.0.drv'
error: 1 dependencies of derivation '/nix/store/mzfm789rsdad34yx2iwyk9dmiai1mj85-python3.13-httpbin-0.10.2.drv' failed to build
error: 1 dependencies of derivation '/nix/store/ygl27rqg58v6vivq2nmzqrvjh4a5whz7-python3.13-websockets-15.0.1.drv' failed to build
error: 1 dependencies of derivation '/nix/store/iqg1r3w97qpjgm92kd5g5iwnkmb7b89f-python3.13-fastapi-cli-0.0.20.drv' failed to build
┏━ 1 Errors: 
┃ error: builder for '/nix/store/h0y3329l8vbq06bggxa58wv5rgsbk7vd-python3.13-watchdog-6.0.0.drv' failed with exit code 1
┣━ Dependency Graph:
┃                                                                                  ┌─ ⏵ boost-1.87.0
┃                                                                               ┌─ ⏸ systemtap-5.4
┃                                                                            ┌─ ⏸ systemtap-5.4
┃                                                                         ┌─ ⏸ glib-2.86.3
┃                                                                      ┌─ ⏸ gts-0.7.6
┃                                                                   ┌─ ⏸ graphviz-12.2.1
┃                                                                ┌─ ⏸ wayland-1.24.0
┃                                                             ┌─ ⏸ vulkan-loader-1.4.335.0
┃                                                          ┌─ ⏸ ffmpeg-headless-8.0
┃                                                       ┌─ ⏸ python3.13-matplotlib-3.10.5
┃                                                    ┌─ ⏸ python3.13-pytest-regressions-2.8.1
┃                                                 ┌─ ⏸ python3.13-markdown-it-py-3.0.0
┃                                              ┌─ ⏸ python3.13-rich-14.2.0
┃                                           ┌─ ⏸ python3.13-executing-2.2.1
┃                                        ┌─ ⏸ python3.13-stack-data-0.6.3
┃                                     ┌─ ⏸ python3.13-ipython-9.7.0
┃                                  ┌─ ⏸ python3.13-python-dotenv-1.2.1
┃                                  │  ┌─ ⚠ python3.13-watchdog-6.0.0 failed with exit code 1 after ⏱ 1m1s in pytestCheckPhase
┃                                  ├─ ⏸ python3.13-werkzeug-3.1.4
┃                               ┌─ ⏸ python3.13-flask-3.1.2
┃                            ┌─ ⏸ python3.13-flasgger-0.9.7.1
┃                         ┌─ ⏸ python3.13-httpbin-0.10.2
┃                      ┌─ ⏸ python3.13-pytest-httpbin-2.1.0
┃                   ┌─ ⏸ python3.13-httpcore-1.0.9
┃                ┌─ ⏸ python3.13-httpx-0.28.1
┃             ┌─ ⏸ python3.13-proxy-py-2.4.10
┃          ┌─ ⏸ python3.13-aiohttp-3.13.2
┃       ┌─ ⏸ python3.13-black-25.1.0
┃    ┌─ ⏸ python3.13-inline-snapshot-0.28.0
┃ ┌─ ⏸ python3.13-rich-toolkit-0.15.1
┃ ⏸ python3.13-fastapi-cli-0.0.20
┣━━━ Builds           
┗━ ∑ ⏵ 1 │ ✔ 0 │ ⏸ 352 │ ⚠ Exited after 1 build failures at 01:04:21 after 1m6s

Additional context

No response

System metadata

• system: "x86_64-linux"
• host os: Linux 6.1.0-41-amd64, Debian GNU/Linux, 12 (bookworm), nobuild
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.24.9
• channels(root): "nixpkgs"
• nixpkgs: /root/.cache/nixpkgs-review/pr-474303-4/nixpkgs

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[Sigmanificient]

Building as root in single user mode requires setting

export NIX_REMOTE=daemon