Update dependencies #649

Job	Run time
pkgs-linux: nixpkgs: build	2m 44s
pkgs-linux: nixpkgs: prebuilt	8m 49s
pkgs-linux: haskell-nix: build	1m 15s
pkgs-linux: haskell-nix: prebuilt	1m 16s
pkgs-linux: shajra: build	1m 37s
pkgs-linux: shajra: prebuilt	1m 14s
installers-linux	18s
pkgs-darwin: nixpkgs: build	3m 25s
pkgs-darwin: nixpkgs: prebuilt	12m 2s
pkgs-darwin: haskell-nix: build	2m 0s
pkgs-darwin: haskell-nix: prebuilt	2m 1s
pkgs-darwin: shajra: build	2m 1s
pkgs-darwin: shajra: prebuilt	2m 25s
	41m 7s

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