anchor.diff:  
         f2c = callPackage ./f2c { };
   
  -      tests = {
  +      tests = with self; {
           cfour = callPackage ./tests/cfour { };
           cp2k = callPackage ./tests/cp2k { };
           bagel = callPackage ./tests/bagel { };
  
positive.code:           sha256 = sha256;
          };
  
        #
        # Applications
        #
  
negative.code: 
        bagel-serial = callPackage ./bagel { mpi = null; blas = self.mkl; };
  
        cefine = self.nullable self.turbomole (callPackage ./cefine { });
  
        cfour = callPackage ./cfour { };
  
  