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XCode26.1 upgrade and flutter macOS were broken #178195

@lucasjinreal

Description

@lucasjinreal

Steps to reproduce

clang: error: conflicting deployment targets, both '26.1' and '25.1' are present in environment

Expected results

clang: error: conflicting deployment targets, both '26.1' and '25.1' are present in environment

Actual results

clang: error: conflicting deployment targets, both '26.1' and '25.1' are present in environment

Code sample

Code sample
[Paste your code here]clang: error: conflicting deployment targets, both '26.1' and '25.1' are present in environment

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Logs

Logs
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Flutter Doctor output

Doctor output
Flutter is already up to date on channel stable
Flutter 3.35.7 • channel stable • https://github.com/flutter/flutter.git
Framework • revision adc9010625 (3 weeks ago) • 2025-10-21 14:16:03 -0400
Engine • hash 6b24e1b529bc46df7ff397667502719a2a8b6b72 (revision 035316565a) (17 days ago) • 2025-10-21
14:28:01.000Z
Tools • Dart 3.9.2 • DevTools 2.48.0```

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