anchor.diff:  , aws-sdk-cpp
   , busybox
   , boehm-gc
  +, boost
   , brotli
   , bzip2
   , curl
  
positive.code:     # we can't use upstream binaries
      "--localstatedir=/nix/var"
      "--enable-gc"
      "--disable-init-state"
      "--with-store-dir=${storeDir}"
      "--with-sandbox-shell=${busybox}/bin/busybox"
    ];
  
negative.code:     inherit
        version;
      srcVerification = fetchurl {
        failEarly = true;
        inherit (src)
          outputHash
          outputHashAlgo
          urls;
        fullOpts = {
          sha256Url = map (x: "${x}.sha256") src.urls;
        };
      };
    };
  
  