`fx-why`

explain why a package is in the store (provenance)

usage: fx-why [OPTIONS] [PKG]

field	type	default	flag / operand
`as_of`	`Optional Natural`	`None`	`--as-of` N
`operand`	`Text`	`"."`	`PKG`
`store`	`Optional Text`	`None`	`--store` TEXT