Merge two attribute sets shallowly, right side trumps left mergeAttrs :: attrs -> attrs -> attrs Inputs x Left attribute set y Right attribute set (higher precedence for equal keys) Examples lib.trivial.mergeAttrs usage examplemergeAttrs { a = 1; b = 2; } { b = 3; c = 4; } => { a = 1; b = 3; c = 4; }