Integration Services :: Pass Single Column Of Values From Successful Merge Join To EXECUTE Statement

How do I pass a single column of values from a successful merge join to an EXECUTE SQL statement so it can be used with an "IN" criteria of the WHERE clause?  Here's an example of my update statement with two random key values:

UPDATE dbo.MyTable SET MyStatus = 1 WHERE MyPK IN ("XYZ123", "DEF890")

Is this even possible in SSIS, or am I better off using a loop and running the update EXECUTE SQL Statement for each individual key value, as in the following example?

UPDATE dbo.MyTable SET MyStatus = 1 WHERE MyPK = "XYZ123"
UPDATE dbo.MyTable SET MyStatus = 1 WHERE MyPK = "DEF890"