/tmp/env-vars not cleaned up, and owned by root

[bobrippling]

Describe the bug

I see an error about /tmp/env-vars not being removable:

$ nix-shell -p bash
this path will be fetched (0.06 MiB download, 0.31 MiB unpacked):
  /nix/store/9r03kc5pg7ipi4yimkj386jsf34dxcpx-bash-5.2p32-dev
copying path '/nix/store/9r03kc5pg7ipi4yimkj386jsf34dxcpx-bash-5.2p32-dev' from 'https://cache.nixos.org'...
install: cannot remove '/tmp/env-vars': Operation not permitted

(ins)[nix-shell:~]$

specifically, install: cannot remove '/tmp/env-vars': Operation not permitted

$ ls -l /tmp/env-vars
-rw------- 1 root root 6515 Sep  2 05:27 /tmp/env-vars

Steps To Reproduce

1. See above description - any execution of nix-shell
2. See error above

Expected behavior

No error about /tmp/env-vars is emitted

nix-env --version output

nix-env (Nix) 2.18.5

Additional context

I believe this is where the error occurs

See also this old issue: #262

Priorities

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[voidzero]

I have this issue too. Additionally, though not sure if this is related, /etc/nix/path is no longer being generated by nixos-rebuild.

[voidzero]

Hilighting @flokli (thanks)

[Ruhrozz]

same problem here

[interroobang]

Same problem here... I just trying to make multimonitor setup on tty framebuffer.... I could'nt use nix-shell now...

[Artturin]

Maybe caused by the same commit as #11473
But the fix will be different.

[Mic92]

So nix develop creates a temporary directory for NIX_BUILD_TOP. I think nix-shell should do the same.
The current work around is to do this: TEMP=$PWD nix-shell -p bash

[Mic92]

I think we need something like this: #11713