[Error] Launching fish shell does not set prompt correctly

[rishubn]

Describe the bug
Supposedly, this PR: 1588 set the default fish prompt within a container, however when I launch fish I get the prompt of my host:

To Reproduce

rishub@host ~/> distrobox-create --name dev --image fedora:latest
rishub@host ~/> distrobox enter dev
rishub@host ~/> distrobox-create --name dev --image fedora:latest
📦[rishub@dev ~]$ fish
Welcome to fish, the friendly interactive shell
Type help for instructions on how to use fish
rishub@host ~/> 

Expected behavior
I expect the prompt to be unique to the container as set in the PR

Logs
distrobox: 1.8.1.2