anchor.diff:        buildInputs = with pkgs; [ stdenv git openjdk gnutar gzip bash maven3 wget unzip ant ];
         
         buildCommand = ''
  -        mkdir -p $out
  +        ensureDir $out
           cd $out
           
         	cp -R ${aster}/. $out/aster
  
positive.code: 
  
        	cd spoofax-deploy/org.metaborg.maven.build.strategoxt
        	mkdir -p strategoxt-distrib
        	cd strategoxt-distrib
          if [[ -d ${strategoxtDistrib} ]]; then
            tar -xf ${strategoxtDistrib}/strategoxt-distrib.tar
  
negative.code:     };
    };
  in jobs
  