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unknown_platform

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The platform '{0}' is not a recognized platform.

Description

#

The analyzer produces this diagnostic when an unknown platform name is used as a key in the platforms map. To learn more about specifying your package's supported platforms, check out the documentation on platform declarations.

Example

#

The following pubspec.yaml produces this diagnostic because the platform browser is unknown.

yaml 
name: example
platforms:
  browser:

Common fixes

#

If you can rely on automatic platform detection, then omit the top-level platforms key.

yaml 
name: example

If you need to manually specify the list of supported platforms, then write the platforms field as a map with known platform names as keys.

yaml 
name: example
platforms:
  # These are the known platforms
  android:
  ios:
  linux:
  macos:
  web:
  windows:

Unless stated otherwise, the documentation on this site reflects Dart 3.9.2. Page last updated on 2025-9-1. View source or report an issue.