Collectives™ on Stack Overflow

Find centralized, trusted content and collaborate around the technologies you use most.

Teams

Q&A for work

Connect and share knowledge within a single location that is structured and easy to search.

Because every version of flutter_test from sdk depends on... flutter_test from sdk is forbidden, version solving failed

It means flutter_test depends on a dependency with version lower than you specified in another dependency.

To solve this, open pubspec.yaml, and remove the version number of the problem dependency:

Example:

Change

  archive: ^2.0.13 --> remove this number
  archive: 
                Is this recommended solution? As far as I know omitting dependency version is discouraged
– Michał Powłoka
                Aug 10, 2021 at 15:24
                this solution works, but is it possible to degreade the versions for the dependency needed by fluttr_test?
– ulyssis2
                Jun 13 at 10:14
You have provided or trying to use http: ^0.12.0 dependency on implementing API calls in pubspec.yaml file but flutter_test will require http: ^0.11.3+17. That's why it fails. Please replace 
dependencies:
  flutter:
    sdk: flutter
  http: ^0.12.0
dependencies:
  flutter:
    sdk: flutter
  http: ^0.11.3
Hope it will help you out.
I was facing a similar error. I solved it by removing all the version numbers from the dependencies: section in pubspec.yaml.
So, if my pubspec.yaml looked like this before:
dependencies:
  freezed_annotation: ^0.14.3
I changed it to this:
dependencies:
  freezed_annotation:
I'm assuming this fetches the latest "possible" version of each package.
                This answer is the same as (or very similar to) this one. It would be better to upvote that answer instead of posting it again. Invest some time in the site and you will gain sufficient privileges to upvote answers that helped you.
– LW001
                Sep 1, 2021 at 20:05
I encountered this error when trying to update the collection package.
My error:
Because butler_labs depends on flutter from sdk which depends on collection 1.17.1, collection 1.17.1 is required.
So, because butler_labs depends on collection ^1.17.2, version solving failed.
The solution was to run flutter update-packages --force-upgrade which updated the dependencies in my local instance of Flutter. This command is mentioned in the official docs.
Try to change the dependency version that you were added in your pubspec.yaml file
don't use the current or latest version try some previous versions of dependency.
for ex - if you are using latest sqflite version then chnage to previous version of that and then re-run your whole project.
                While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference.  Link-only answers can become invalid if the linked page changes. - From Review
– Sagar
                Jun 29, 2022 at 6:47
                I wanted to have the latest version of http dependency but it looks like flutter current beta version doesn't support it so I removed the version constraint and it stopped giving me the error and added the dependency.
– Shoaib Nomani
                Nov 6, 2018 at 8:15
If your app doesn't have too many dependencies that could broke, you can try to upgrade your Flutter version: flutter upgrade.
It most probably will fix this problem. But always be sure to understand that your app might break at unexpected places.
So you're fine if:
either you're doing it for small app
or it's big app at work and it has extensive tests that will tell you something has broken
if big app without tests, be sure to test every important place of the app, where dependencies are being used
Let's say the matcher package has encountered the following issue, which is the real case I suffered in the past:
Because matcher >=0.12.15 depends on test_api ^0.5.0 and every version of flutter_test from sdk depends on test_api 0.4.16, matcher >=0.12.15 is incompatible with flutter_test from sdk.
So, because myapp depends on both flutter_test from sdk and matcher ^0.12.15, version solving failed.
Simply run three commands subsequently:
flutter pub remove matcher
flutter pub add --dev matcher
flutter pub get
Finally there is a line change in pubspec.yaml:
# before
  matcher: ^0.12.15
# after
  matcher: ^0.12.13
And myapp can be run successfully using the above solution to upgrade flutter in channel stable, and upgrade flutter pub packages:
# upgrade flutter in channel stable
flutter channel stable
flutter upgrade
# upgrade flutter pub packages
flutter pub outdated
flutter pub upgrade
Change depending attributes version inside pubspec.yaml
if it says depands on http *** than change http version
or if it says depands on collection *** than change collection version.
        
Thanks for contributing an answer to Stack Overflow!
Please be sure to answer the question. Provide details and share your research!
But avoid …
Asking for help, clarification, or responding to other answers.
Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.