Nix

A very nice package management system with some confusing command syntax.

Investigate a derivation

nix-diff can be used to find why derivations are different.

nix-diff /nix/store/...-a.drv /nix/store/...-b.drv

Find the derivation for a given nix store path:

nix-store -q --deriver /nix/store/...-name-0.0.0

Dump a derivation as JSON:

nix show-derivation /nix/store/...-a.drv

Find why a derivation has a dependency:

nix why-depends -a -f default.nix 'attrnameHere' 'theDepAttrName'