anchor.diff:        sha256 = "4ed66f255e50d2c9ea9f0b3fbaa92bde9b8acf6a5fafb0d7f12b254be9de99e9";
         rev = ''831f0180967f09b1dd345fef82144f48334279c3'';
       };
  +    overrides = x: {
  +      linkedSystems = [];
  +      postInstall = ''
  +        export CL_SOURCE_REGISTRY="$CL_SOURCE_REGISTRY:$out/lib/common-lisp/query-fs"
  +	export HOME=$PWD
  +	build-with-lisp.sh sbcl \
  +	  ":query-fs $(echo "$linkedSystems" | sed -re 's/(^| )([^ :])/:\2/g')" \
  +	  "$out/bin/query-fs" \
  +	  "(query-fs:run-fs-with-cmdline-args)"
  +      '';
  +    };
     };
   
     cl-fuse = buildLispPackage rec {
  
positive.code:     overrides = x:{
        preConfigure = ''
          export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -I${pkgs.mysql}/include/mysql"
  	export NIX_LDFLAGS="$NIX_LDFLAGS -L${pkgs.mysql}/lib/mysql"
        '';
      };
    };
  
negative.code:     overrides = x : {
        configurePhase = ''
          export CL_SOURCE_REGISTRY="$CL_SOURCE_REGISTRY:$PWD"
          export makeFlags="$makeFlags LISP=common-lisp.sh"
        '';
      };
    };
  