these derivations will be built: /nix/store/57fmrf7af0nq9chfac42pbidkxwx5j6z-haskell-hjsmin-ghc7.4.1.20120412-0.1.1.drv /nix/store/adqgf30jjlx23gzb9h90rnwcxcbiizib-haskell-utf8-light-ghc7.4.1.20120412-0.4.0.1.drv /nix/store/d32qq39s24lja9npyipyqbj6pjamw4mf-haskell-language-javascript-ghc7.4.1.20120412-0.5.4.drv waiting for locks or build slots... @ build-started /nix/store/d32qq39s24lja9npyipyqbj6