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error:
       … from call site
         at /pwd/in.nix:1:1:
            1| ({a, b, c}: a + b + c) {c = 1; d = 1; e = 1; f = 1;}
             | ^
            2|

       error: function 'anonymous lambda' called without required arguments 'a' and 'b' and with unexpected arguments 'd', 'e' and 'f'
       at /pwd/in.nix:1:2:
            1| ({a, b, c}: a + b + c) {c = 1; d = 1; e = 1; f = 1;}
             |  ^
            2|
       Did you mean one of a or b?