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Factor Cannot apply “call” to a run-time computed value

I wanted to map over a nested array in factor so I created a helper function:

: nested-map ( a quote -- a' ) swap [ over map ] map nip ;

which i then called with

{ { 1 2 } { 3 4 } } [ 1 + ] nested-map

But when I call it I get the error from the title.

If I just paste the body of the function it works as intended:

{ { 1 2 } { 3 4 } } [ 1 + ] swap [ over map ] map nip

So I guess I have two questions: is there a better way to achieve the original goal, but also how am I supposed to create higher order functions without getting this error?

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