NIXOPS_STATE ?= ./state/eldiron.nixops
NIXOPS_DEPLOYMENT = cef694f3-081d-11e9-b31f-0242ec186adf
-nixpkgs ?= https://releases.nixos.org/nixos/19.03/nixos-19.03.172754.0728c3e026e/nixexprs.tar.xz
+nixpkgs ?= https://releases.nixos.org/nixos/19.03/nixos-19.03.173009.2516c454c35/nixexprs.tar.xz
NIX_PATH = nixpkgs=${nixpkgs}:nixpkgsNext=${nixpkgs}:nixpkgsPrevious=${nixpkgs}
NIXOPS := $(shell NIX_PATH=$(NIX_PATH) nix-build --no-out-link -E "with import <nixpkgs> { overlays = builtins.attrValues (import ../overlays); }; nixops")/bin/nixops