[Nix-dev] Check the priority of package in the nix store

[Vladimír Čunát]

On 01/31/2015 09:19 PM, Richard Wallace wrote:
> Is there a way to check the priority of something in the nix-store? Any
> ideas why the priority is being ignored and/or lost in this process? Am
> there something wrong in my process?

The packages in nix store don't really have any priority themselves. 
nix-env evaluates priority for a package at the moment when it's 
(re-)installed into an environment, and records it in a manifest file of 
that particular environment. You can inspect that file, too, e.g. 
~/.nix-profile/manifest.nix

So, e.g. if you changed the priorities in the expressions but not 
re-installed from them since, the packages will keep the old priorities 
in those envs.

Vladimir


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