AEA decryption doesn't work on temporary directories on non-MacOS systems

[Jonathan-David7]

What happened?

AEA decryption using ipsw fw aea <aea_encrypted_dmg> doesn't work on temporary directories on non-MacOS systems.
Tested on Linux, decrypting from /tmp didn't work.
Here's the output from my machine:

$ file /tmp/jon/092-09224-209.dmg.aea
/tmp/jon/092-09224-209.dmg.aea: data
$ ipsw fw aea -o . /tmp/jon/092-09224-209.dmg.aea
   ⨯ failed to parse AEA: failed to parse AEA: open /tmp/jon/092-09224-209.dmg.aea: no such file or directory

How can we reproduce this?

1. Extract an AEA-encrypted DMG (.dmg.aea) file from an IPSW/OTA update file.
2. Move the AEA DMG file to a temporary directory (could be anything in /tmp on Linux).
3. Try to decrypt the AEA DMG file from the temporary directory (to anywhere, it doesn't matter): ipsw fw aea /tmp/<path_to_aea_dmg>.

ipsw version

3.1.565

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Additional context

No response