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I recommend also using direnv, with nix-direnv (home-manager has a setting to trivially enable nix-direnv). This lets you integrate your shell.nix environment i

• bjtitus 5y ago
  Oh wow, this is fantastic! Thanks for the tip and I'd like to thank you for all of the work you do on nix + Darwin. I'm using your `nix-env.fish` package and it's made things much easier than when I tried this setup a few years ago.
  • lilyball 5y ago
    I'm glad to hear it! Though these days I don't actually use it at all, I finally switched to using nix-darwin[1] which means I get a NixOS-like fish initialization. Also prior to that I got the fish package updated with a new override option fishEnvPreInit that lets you write an overlay like self: super { fish = super.fish.override { fishEnvPreinit = sourceBash: sourceBash "${self.nix}/etc/profile.d/nix-daemon.sh"; ]; } This would source the given bash script (using fenv IIRC) at the same point that NixOS fish would load its environment, thus producing the same behavior (notably, setting up all of the various directories prior to running any user code, unlike nix-env.fish that has to try and patch things up after the fact). The downside is that it means you have to recompile fish. [1] https://github.com/LnL7/nix-darwin https://github.com/LnL7/nix-darwin