Homebrew - I cannot install from source. Command clang requires CLT

I have installed XCode 12 from my MBP. Then I cleaned old Command Line Tools. After that I downloaded CLT 12 from Apple website and installed it fine.

Now The issue is I cannot build anything from source with brew. It keeps throwing at me the dialog below. I have tried

sudo xcode-select -r - No success sudo xcode-select --install I get error message (rightfully so) xcode-select: error: command line tools are already installed, use "Software Update" to install updates

I have tried anything I could but I still get the same dialog.

The commands: sudo xcode-select -pshows /Applications/Xcode.app/Contents/Developer which clang shows /usr/bin/clang

and brew config

HOMEBREW_VERSION: 2.5.2
ORIGIN: https://github.com/Homebrew/brew
HEAD: cd4a3c0588abb82d916bc8558f4c157e951d449d
Last commit: 3 days ago
Core tap ORIGIN: https://github.com/Homebrew/homebrew-core
Core tap HEAD: 63a79e6180f8015f815cd99f148a2cc9c923032f
Core tap last commit: 26 minutes ago
Core tap branch: master
HOMEBREW_PREFIX: /usr/local
HOMEBREW_CASK_OPTS: []
HOMEBREW_MAKE_JOBS: 8
Homebrew Ruby: 2.6.3 => /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby
CPU: octa-core 64-bit haswell
Clang: 12.0 build 1200
Git: 2.24.3 => /Applications/Xcode.app/Contents/Developer/usr/bin/git
Curl: 7.64.1 => /usr/bin/curl
Java: 14.0.1
macOS: 11.0-x86_64
CLT: 12.0.0.0.1.1599194153
Xcode: 12.0

Sample Command for testing the issue is brew install wxmac --HEAD and the dialog I get is this

I have run out of ideas and would appreciate any help!

I had kept my Copy of Xcode 12 Beta 5 and did extract and dragged to Applications folder. Then I ran sudo xcode-select --switch /Applications/Xcode-beta.app/Contents/Developer and all is well.

Seems like Xcode 12 GM is not working well with macOS 11.0 Beta 7