anchor.diff:        ##
         ## Extra custom steps
         ##
  -
  -    ''
  +    ''
  +
       + extraBuildCommands;
   
     inherit expand-response-params;
  
positive.code:     ''
        set -u
  
        mkdir -p $out/bin $out/nix-support $man/nix-support
  
        wrap() {
          local dst="$1"
  
negative.code:     ''
  
      + optionalString (!nativeTools) ''
        ##
        ## Initial CFLAGS
        ##
  