anchor.diff:      optionals
       platforms;
   
  -  version = "4.21";
  +  version = "4.23";
   
     baseUrls = [
       "https://ftp.mozilla.org/pub/mozilla.org/nspr/releases/v${version}/src"
  
positive.code:     "--enable-64bit"
    ];
  
    # We don't want to keep any static libraries
    postInstall = ''
      find $out -name "*.a" -delete
    '';
  
    passthru = {
      srcVerification = fetchurl {
  
negative.code: 
    src = fetchurl {
      urls = map (n: "${n}/nspr-${version}.tar.gz") baseUrls;
      multihash = "QmbnDUBHks9q1yMwaYQSDFk1Z3Bai12TRVDCMvQQK4Pt5o";
      hashOutput = false;
      sha256 = "4b9d821037faf5723da901515ed9cac8b23ef1ea3729022259777393453477a4";
    };
  
    prePatch = ''
  