nix-hash process substitution example fails with `error: path '/dev/fd/63' is a symlink` on Arch Linux

[Kakadus]

Describe the bug

I cannot run the echo example for nix-hash nix-hash --type sha256 --flat --base32 <(echo test) from https://nix.dev/manual/nix/2.24/command-ref/nix-hash#examples. Then, I only get error: path '/dev/fd/63' is a symlink.

In fact, if I run any nix-hash command that uses the <(...) syntax for input, this fails.

Steps To Reproduce

1. run nix-hash --type sha256 --flat --base32 <(echo test)
2. see error: path '/dev/fd/63' is a symlink

Expected behavior

I expect this to work, as it is an example command. According to the examples 1lkgqb6fclns49861dwk9rzb6xnfkxbpws74mxnx01z9qyv1pjpj should be the correct output.

nix-env --version output

nix-env (Nix) 2.24.7

Additional context

I'm on Arch Linux and used their nix package to install nix.

output of stat <(echo test):

  File: /dev/fd/63 -> pipe:[360496]
  Size: 64              Blocks: 0          IO Block: 1024   symbolic link
Device: 0,22    Inode: 349772      Links: 1
Access: (0500/lr-x------)  Uid: ( 1000/   user)   Gid: ( 1000/   user)
Access: 2024-10-11 21:28:46.230728151 +0200
Modify: 2024-10-11 21:28:46.230728151 +0200
Change: 2024-10-11 21:28:46.230728151 +0200
 Birth: -

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