Revert "Use postinstall in stead of prepublish. This should allow using npm2nix via git specifier in package.json."
Revert "Use postinstall in stead of prepublish. This should allow using npm2nix via git specifier in package.json."

This reverts commit 0ca6eb19c491886aec1c63074eaca67e41f8276e.

NixOS/npm2nix