Nix recommends to remove the wrong installation name

[domenkozar]

This happens when you install a pacakge like nix profile install .

error: An existing package already provides the following file:

         /nix/store/dqj5nn2hlaxhd603c2j4hvych184pv4h-python3.10-devenv-1.0/lib/python3.10/site-packages/examples/simple/devenv.nix

       This is the conflicting file from the new package:

         /nix/store/j1izdcn09lw3kkcn68w7hjggjdk8krb4-python3.10-devenv-1.0/lib/python3.10/site-packages/examples/simple/devenv.nix

       To remove the existing package:

         nix profile remove git+file:///home/domen/dev/cachix/devenv#packages.x86_64-linux.default

       The new package can also be installed next to the existing one by assigning a different priority.
       The conflicting packages have a priority of 5.
       To prioritise the new package:

         nix profile install git+file:///home/domen/dev/cachix/devenv#packages.x86_64-linux.default --priority 4

       To prioritise the existing package:

         nix profile install git+file:///home/domen/dev/cachix/devenv#packages.x86_64-linux.default --priority 6

It should instead offer to remove the store path. cc @bobvanderlinden

[iFreilicht]

Wouldn't removing the store path always fail as that is still referenced by a GC root from the previous profile generation?
What does you nix profile list actually look like in this case?

[bobvanderlinden]

It should instead offer to remove the store path

It would be very inconvenient to suggest the store path in the most used cases, but it should indeed suggest something that works.

The best way imo to resolve this is to implement something like #7967. A first implementation was already made: #8678