anchor.diff:        owner = "tensorflow";
         repo = "tensorflow";
         rev = "v${version}";
  -      sha256 = "1q0848drjvnaaa38dgns8knmpmkj5plzsc98j20m5ybv68s55w78";
  +      sha256 = "0lg8ahyr2k7dmp0yfypk8ivl9a0xcg3j0f0dakmn5ljk8nsji0bj";
       };
   
       patches = [
  
positive.code: 
    tfFeature = x: if x then "1" else "0";
  
    version = "1.15.2";
    variant = if cudaSupport then "-gpu" else "";
    pname = "tensorflow${variant}";
  
  
negative.code: 
        # cudaSupport causes fetch of ncclArchive, resulting in different hashes
        sha256 = if cudaSupport then
          "1bi6aydidgi943hiqj0d279jbz2g173hvafdqla1ifw2qdsm73pb"
        else
          "0l5510fr8n22c4hx9llr0vqqhx9wlgkyxl55fxbixhssd0ai05r4";
      };
  
      buildAttrs = {
  