Pakistan should use every (what little) lobbying capability we have in the EU to make sure any attempt is dead on arrival. Unfortunately, our public image is awful and we have very little in the way of any natural constituency.
If France moves anything like this, we should not hold back in pointing out via MEPs and other member states that they're being lobbied by their own arms industry to pick fights in the subcontinent. There's a real divide in the EU parliament between core states like France and Germany, and the peripheral and member states and the East. If Indians can build a lobby strong enough to move with a lot of effort, we should consolidate a lobby in the East and also with countries like Italy and Sweden who have had business with us.
At the same time, fight fire with fire, damage the credibility of anyone who makes these attempts by your own lobbying and PR efforts, India's international image is better than ours but they've given us some ammo in the last few years worth starting to expend. And of course, any country who wants to sell themselves for a Dassault contract should also face some flack, lobbying charges and weaponisation of EU embargoes at the behest of arms companies will not go down well amongst the EU's ideologue MEPs and people.
Fight back, don't take anything lying down.