Add roast and carrots to slow cooker and add each packet of seasoning.
Add water to the slow cooker and stir it all together to coat.
Cook on low for 6 hours (more if using a larger roast).
Instant Pot
Add water to pressure cooker first.
Combine seasoning mixes and toss with beef and carrots. Add to bottom of pressure cooker.
Secure lid, close venting valve and set pressure to "meat" or manual for 30 minutes. Allow pressure to naturally release for 10 minutes. Release remaining pressure with caution. Serve.