Specify macOS SDK path for utils/build-script

I'm trying to build the project using Xcode 12.4 (12D4e) on macOS 10.15.7 (19H1030). Every time when I try to run the build script with recommended flags:

utils/build-script --skip-build-benchmarks \
  --skip-ios --skip-watchos --skip-tvos --swift-darwin-supported-archs "$(uname -m)" \
  --sccache --release-debuginfo --swift-disable-dead-stripping --test \
  --xcode

It keeps searching for the macOS 11 SDK in Xcode beta, and can't find it because I don't have any Xcode beta installed:

=== BUILD TARGET libcmark OF PROJECT cmark WITH CONFIGURATION Debug ===

Check dependencies
error: There is no SDK with the name or path '/Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.0.sdk'

=== BUILD TARGET libcmark_static OF PROJECT cmark WITH CONFIGURATION Debug ===
Check dependencies
error: There is no SDK with the name or path '/Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.0.sdk'

Running utils/build-script --show-sdk shows that it can find macOS 11.1 SDK in Xcode (not beta):

MacOSX11.1.sdk - macOS 11.1 (macosx11.1)
SDKVersion: 11.1
Path: /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.1.sdk
PlatformVersion: 11.1
PlatformPath: /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform
ProductBuildVersion: 20C63
ProductCopyright: 1983-2020 Apple Inc.
ProductName: macOS
ProductUserVisibleVersion: 11.1
ProductVersion: 11.1
iOSSupportVersion: 14.3

Is there a way for me to ask the build script not to search for the SDK in Xcode beta, but use the one in Xcode instead?