Darwin: Gaps #734

Job	Run time
pkgs-linux: nixpkgs: build	3m 9s
pkgs-linux: nixpkgs: prebuilt	5m 50s
pkgs-linux: haskell-nix: build	2m 17s
pkgs-linux: haskell-nix: prebuilt	2m 14s
pkgs-linux: shajra: build	2m 42s
pkgs-linux: shajra: prebuilt	2m 4s
installers-linux	20s
pkgs-darwin: nixpkgs: build	5m 46s
pkgs-darwin: nixpkgs: prebuilt	10m 36s
pkgs-darwin: haskell-nix: build	3m 38s
pkgs-darwin: haskell-nix: prebuilt	5m 22s
pkgs-darwin: shajra: build	7m 19s
pkgs-darwin: shajra: prebuilt	3m 20s
	54m 37s

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