Do not hardcode /nix/store path

[Kocal]

@tucksaun suggested me to not hardcode /nix/store path, since it can be modified IIUC.

The command nix eval --raw --expr builtins.storeDir gives me the Nix store path:

symfony-cli on  nix-no-hardcode via 🐳 orbstack via 🐹 v1.26.4 took 4s
✗ nix eval --raw --expr builtins.storeDir
/nix/store%

[tucksaun]

LGTM

[fabpot]

Do we need to fallback to /nix/store if nix eval fails?

[tucksaun]

Do we need to fallback to /nix/store if nix eval fails?

we could but I dont think it's worth it: if nix eval fails the user probably has bigger problems than being able to run php using the Symfony CLI

[fabpot]

Thank you @Kocal.