anchor.diff: -{ stdenv, fetchurl, readline }:
  +{ stdenv, fetchurl, readline, nspr }:
   
   stdenv.mkDerivation rec {
     version = "1.8.0-rc1";
  
positive.code:     sha256 = "374398699ac3fd802d98d642486cf6b0edc082a119c9c9c499945a0bc73e3413";
    };
  
    buildInputs = [ readline ];
  
    postUnpack = "sourceRoot=\${sourceRoot}/src";
  
  
negative.code:       sed -e 's/ -ltermcap/ -lncurses/' -i ${makefile}
      '';
  
    makeFlags = "-f ${makefile} JS_DIST=\${out} BUILD_OPT=1 JS_READLINE=1 JS_THREADSAFE=1";
  }
  