09:39 <ehmry> I have small project with a Tup build system, and I'm using `nix build other-project#…` to build a test environment inside my working repository

09:40 <ehmry> I need to run `nix develop` to get the tools to drive the build system, but what if the nix registry were locked to the inputs of a flake when inside a dev-shell?

09:42 <ehmry> i imagine this could be done using an environmental variable like NIX_REGISTRY_

09:45 <ehmry> the Tup tool can track changes to environmental variables, so this would get me a more "correct" build

14:46 <infinisil> ehmry: That's more of a #nixos question :)