pubspec.yaml has no lower-bound SDK constraint

Question

I was taking MDC101 flutter code lab. I cloned the starter project from the git repository as per the instructions but after clonning done, I executed flutter pub get and it gave me the following error.

pubspec.yaml has no lower-bound SDK constraint.
You should edit pubspec.yaml to contain an SDK constraint:
environment:
  sdk: '>=2.10.0 <3.0.0'

Answer 1

If you received this error even when your pubspec.yaml file contained the correct sdk line, be sure to check subfolders in your main folder. This was noted to happen while doing a flutter packages get from the font_awesome_flutter package. The reason was that even though the main pubspec.yaml contained the correct line, there was an offending example/pubspec.yaml. Add the lines to that file:

environment:
  sdk: ">=2.7.0 <3.0.0"

Referenced issue.

Answer 2

As per the error instructions I added the following in my pubspec.yaml

environment:
  sdk: '>=2.10.0 <3.0.0'

And then I executed flutter pub get and it's working fine now.