Chris Martin

Niv

The reproducibility guarantees that Nix can provide are not quite the default; you have to opt into it.

For a few years I've been using Vaibhav Sagar's Quick and Easy Nixpkgs Pinning approach.

More recently I've started using Niv, a more fully-featured tool which does just about the same thing.

I write about Haskell and related topics; you can find my works online on Type Classes and in print from The Joy of Haskell.