python bwrap: Creating new namespace failed

[alex-fu27]

With my home-manager config:

programs.scientific-fhs = {
enable = true;
enableNVIDIA = false;
juliaVersions = [ {
	version = "1.10.1";
	default = true;
} ];
};

When I try to run python, I get:

$ python3
bwrap: Creating new namespace failed: nesting depth or /proc/sys/user/max_*_namespaces exceeded (ENOSPC)

Julia works fine, on the other hand.

The possible explanation which comes to my mind is that Python might be calling another python from ~/.nix-profile/bin/python, which would spawn a nested bwrap.

[fivegrant]

what happens if you run it in a nix shell nixpkgs#python3? i encounter this issue as well but i also don't have a system-wide installation of python. it works fine though when i build an application or shell.

[alex-fu27]

No, doesn't happen with nix shell nixpkgs#python3. But I found where the recursion comes from:
If you call python3 from scientific-fhs (~/.nix-profile/bin/python3), then this will execute bwrap with a /nix/store/*-python3-init, which is a shell script that sets up an /etc/ld.so.conf file and finally calls exec python3 "$@ which resolves to ~/.nix-profile/bin/python3 again, leading to the recursion.