[Nix-dev] nix-shell with overlay?

[Profpatsch]

On 17-03-07 03:57pm, Matthias Beyer wrote:
> Hi,
> 
> is there a way to import an overlay in a default.nix for a nix-shell 
> and use the packages from the overlay in the nix-shell only, without 
> installing the overlay "globally" for my user?
> 
> If yes, how?

Not sure what you mean, how about just adding the overlay to the default.nix?

import <nixpkgs> {
  overlays: [(self: super: {
    myDep = super.myDep.override {
      …
    };
    myPkg = self.callPackage ./. {};
  })];
}

nix-build -A myPkg

echo "(import ./.).myPkg" > shell.nix
nix-shell

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