anchor.diff:  
             src = lowdown-src;
   
  -          outputs = [ "out" "dev" ];
  +          outputs = [ "out" "bin" "dev" ];
   
             nativeBuildInputs = [ which ];
   
  
positive.code:             ''
                ./configure \
                  PREFIX=${placeholder "dev"} \
                  BINDIR=${placeholder "out"}/bin
              '';
          };
  
  
negative.code:           [
              buildPackages.bison
              buildPackages.flex
              (lib.getBin buildPackages.lowdown)
              buildPackages.mdbook
              buildPackages.autoconf-archive
              buildPackages.autoreconfHook
  