anchor.diff:            homepage = "http://github.com/ekmett/lens/";
             description = "Lenses, Folds and Traversals";
             license = stdenv.lib.licenses.bsd2;
  +        }) {};
  +      lifted-async = callPackage ({ async, base, constraints, lifted-base, mkDerivation, monad-control, stdenv, transformers-base }:
  +      mkDerivation {
  +          pname = "lifted-async";
  +          version = "0.9.3";
  +          sha256 = "97978307f34c8ab1d765724d723a13fede4112a94fe5fbf3494f00378961b461";
  +          libraryHaskellDepends = [
  +            async
  +            base
  +            constraints
  +            lifted-base
  +            monad-control
  +            transformers-base
  +          ];
  +          doHaddock = false;
  +          doCheck = false;
  +          homepage = "https://github.com/maoe/lifted-async";
  +          description = "Run lifted IO operations asynchronously and wait for their results";
  +          license = stdenv.lib.licenses.bsd3;
           }) {};
         lifted-base = callPackage ({ base, mkDerivation, monad-control, stdenv, transformers-base }:
         mkDerivation {
  
positive.code:           description = "Cardano SL - the SSC class";
            license = stdenv.lib.licenses.mit;
          }) {};
        cardano-sl-tools = callPackage ({ Chart, Chart-diagrams, Glob, MonadRandom, QuickCheck, aeson, ansi-wl-pprint, array, async, attoparsec, base, base58-bytestring, bytestring, canonical-json, cardano-report-server, cardano-sl, cardano-sl-core, cardano-sl-db, cardano-sl-infra, cardano-sl-lrc, cardano-sl-ssc, cardano-sl-txp, containers, cpphs, cryptonite, data-default, directory, ed25519, ether, fgl, filepath, foldl, formatting, graphviz, kademlia, lens, log-warper, mkDerivation, mtl, neat-interpolation, node-sketch, optparse-applicative, parsec, pipes, pipes-bytestring, pipes-interleave, pipes-safe, process, random, random-shuffle, safe-exceptions, serokell-util, stdenv, stm, system-filepath, tar, text, text-format, time, time-units, universum, unix-compat, unordered-containers, vector, yaml }:
        mkDerivation {
            pname = "cardano-sl-tools";
            version = "1.0.1";
  
negative.code:             graphviz
              kademlia
              lens
              lifted-async
              log-warper
              MonadRandom
              mtl
  