fix fetchDartDeps

[linsui]

Description of changes

Use flutter for flutter package. I got The Flutter SDK is not available. error with dart. I guess #262789 broke something.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 24.05 Release Notes (or backporting 23.05 and 23.11 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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@NixOS/flutter

[FlafyDev]

Nice! I can now build localsend without it failing with "The Flutter SDK is not available.".
Where did you get "The Flutter SDK is not available."?

[linsui]

Where did you get "The Flutter SDK is not available."?

In the build log.

[FlafyDev]

Where did you get "The Flutter SDK is not available."?

In the build log.

build log of your own package? Or of a package in nixpkgs?

[linsui]

build log of your own package? Or of a package in nixpkgs?

Build log of localsend. :)

[mkg20001]

Please change the commit message to "dart: fix fetchDartDeps"