CODEWITHSUNDEEP
flutter
GI HYUN NAM
GI HYUN NAM

Reputation: 459

Flutter Error on line 6, column 5 of pubspec.yaml: A dependency may only have one source. sdk: flutter ^^^^^^^^^^^^^

I keep getting

Running "flutter packages get" in flutter_sportters...
Error on line 6, column 5 of pubspec.yaml: A dependency may only have one source.
    sdk: flutter
    ^^^^^^^^^^^^^

When I run my app or Packages Get.

It worked perfectly fine before. Have no idea how to fix this.

Upvotes: 45

Views: 65625

Answers (16)

Pratik Lakhani
Pratik Lakhani

Reputation: 333

Use This extension for batter experience : YAML

Example:

enter image description here

Happy coding🧑‍💻.

Upvotes: 0

MhdBasilE
MhdBasilE

Reputation: 458

make sure, the name of your project is not same as any package , this too cause for this error

Upvotes: 1

swetha sasanapuri
swetha sasanapuri

Reputation: 365

Check indentations as flutter package in pubspec.yaml takes single dependency source.

Upvotes: 3

Nimish David Mathew
Nimish David Mathew

Reputation: 3168

I was trying to add assets folder to my project. I added it under dependencies which caused the error:

dependencies:
  flutter:
    sdk: flutter
    assets:
      - images/

It's not to be added under dependencies. Instead, add it under flutter:

flutter:
  uses-material-design: true
  assets:
    - images/

Upvotes: 10

Abdulhakim Zeinu
Abdulhakim Zeinu

Reputation: 3829

After checking all other solutions if the problem still persists make sure whether the specified library is installed correctly or not. This error also encounter when the library is not installed correctly.

Upvotes: 0

ammar188
ammar188

Reputation: 73

I ran into the same problem turns out the name of my app and the package name were same which resulted into this error.

name of the app scrapy and the dependency was also scrapy...

Changed the name and it worked.

Upvotes: 0

Mahalakshmi
Mahalakshmi

Reputation: 330

Its due to indentation: check out correct way

name: flutter_app description: A new Flutter application.

environment: sdk: ">=2.1.0 <3.0.0"

dependencies: flutter: sdk: flutter http: "0.11.3+17" autocomplete_textfield: ^1.6.4

dev_dependencies: flutter_test: sdk: flutter

flutter: uses-material-design: true

Upvotes: 0

Pravin Yadav
Pravin Yadav

Reputation: 367

Indentation !!! Being newbees making silly mistakes. I have written the new dependency inside the flutter root as : 

dependencies:
  flutter:
    sdk: flutter
    sqflite:

Instead of

dependencies:
  flutter:
    sdk: flutter
  sqflite:

Comment when you see the difference!!

Upvotes: 18

Grafritz Design
Grafritz Design

Reputation: 728

I solve My problem:

Here my first Code

dependencies
flutter:
    sdk: flutter
    webfeed: ^0.4.2

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^0.1.2

after I change it

dependencies:
  flutter:
    sdk: flutter

  webfeed: ^0.4.2

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^0.1.2

I thing you must to put your package name in the same number colunm of flutter: and cupertino_icons:

Upvotes: 4

Zeeshan Akhtar
Zeeshan Akhtar

Reputation: 521

I am getting this error due to duplication of a package in dependencies i.e: dependencies:

flutter: sdk: flutter

**cupertino_icons: ^0.1.2**
  english_words: ^3.1.5

# The following adds the Cupertino Icons font to your application. # Use with the CupertinoIcons class for iOS style icons.

cupertino_icons: ^0.1.2

I solved this error by removing duplication then Flutter clean and then Flutter Packages Get.

Upvotes: 0

Prof. John
Prof. John

Reputation: 1

I kept getting this error no matter what I did, including commenting out the new lines. Finally, I put them back in with the correct indentation and ran the program. The problem magically resolved itself. However, the indentation is critical.

Upvotes: 0

BraveEvidence
BraveEvidence

Reputation: 85

Other answers are correct. I would also like to add that I was trying to add shared_preferences and even though my indentation was correct, I was still getting the error mentioned in the question. To resolve it I changed the name of my project as it was also shared preferences

Upvotes: 0

Ahsan Khan
Ahsan Khan

Reputation: 11

open your pubspec.yaml file 

dependencies:
  flutter:
    sdk: flutter

  cupertino_icons: ^0.1.2
  country_code_picker: ^1.0.4

Upvotes: 0

Md Nakibul Hassan
Md Nakibul Hassan

Reputation: 2858

It throws an error because of Indention. It is important to maintain Indention while adding a dependency in flutter.

Before : 

dependencies:
  flutter:
    sdk: flutter

  cupertino_icons: ^0.1.2
  english_words: ^3.1.0

After : 

dependencies:
  flutter:
    sdk: flutter

cupertino_icons: ^0.1.2
english_words: ^3.1.0

Hope this will solve your error. Happy coding!!!

Upvotes: 46

priwiljay
priwiljay

Reputation: 2723

Consider you are going to use this package "shared_preferences".

You will get this error in pubspec.yaml. If you did like below.

dependencies:
 flutter:
  sdk: flutter
  shared_preferences: v0.4.2

Indention is important you are accidentally adding shared_preference package below flutter dependency. So the error "A dependency may only have one source"

Correct format below:

dependencies:
 flutter:
  sdk: flutter

 shared_preferences: v0.4.2 #no indention

Upvotes: 97

Mohit Suthar
Mohit Suthar

Reputation: 9375

You can define just like that in pubspec.yaml file

dependencies:
  flutter:
    sdk: flutter
  image_picker: 0.4.1

and flutter packages get you can call via terminal or if you are using Android Studio than options availbale above when you edit pubspec.yaml file.

In terminal go to your project directory and then enter flutter packages get

Upvotes: 5

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