Can't build an {N} 6.3.0 iOS app due to pod install failure

Environment

tns doctor:

$ tns doctor
✔ Getting environment information 

No issues were detected.
✔ Your ANDROID_HOME environment variable is set and points to correct directory.
✔ Your adb from the Android SDK is correctly installed.
✔ The Android SDK is installed.
✔ A compatible Android SDK for compilation is found.
✔ Javac is installed and is configured properly.
✔ The Java Development Kit (JDK) is installed and is configured properly.
✔ Xcode is installed and is configured properly.
✔ xcodeproj is installed and is configured properly.
✔ CocoaPods are installed.
✔ CocoaPods update is not required.
✔ CocoaPods are configured properly.
✔ Your current CocoaPods version is newer than 1.0.0.
✔ Python installed and configured correctly.
✔ The Python 'six' package is found.
✔ Xcode version 11.3.0 satisfies minimum required version 10.
✔ Getting NativeScript components versions information...
✔ Component nativescript has 6.3.0 version and is up to date.
✔ Component tns-core-modules has 6.3.2 version and is up to date.
✔ Component tns-android has 6.3.0 version and is up to date.
✔ Component tns-ios has 6.3.0 version and is up to date.

Describe the bug This is a build-time error. The Webpack build completes, but the native app build fails at the pod install stage:

Installing pods...
Analyzing dependencies
[!] CocoaPods could not find compatible versions for pod "MaterialComponents/Tabs":
  In Podfile:
    MaterialComponents/Tabs (~> 94.5)

None of your spec sources contain a spec satisfying the dependency: `MaterialComponents/Tabs (~> 94.5)`.

You have either:
 * out-of-date source repos which you can update with `pod repo update` or with `pod install --repo-update`.
 * mistyped the name or version.
 * not added the source repo that hosts the Podspec to your Podfile.

Note: as of CocoaPods 1.0, `pod repo update` does not happen on `pod install` by default.
'pod install' command failed.
For more information on resolving CocoaPod issues in NativeScript read.

My platforms/ios/Podfile looks like this:

use_frameworks!

target "sample" do
# NativeScriptPlatformSection /Users/jamie/Documents/git/react-nativescript/sample/node_modules/@nativescript/core/platforms/ios/Podfile with 9.0
platform :ios, '9.0'
# End NativeScriptPlatformSection

# Begin Podfile - /Users/jamie/Documents/git/react-nativescript/sample/node_modules/@nativescript/core/platforms/ios/Podfile
# platform :ios, '9.0'
use_frameworks!

pod 'MaterialComponents/Tabs', '~> 94.5'
# End Podfile
end

To Reproduce

git clone https://github.com/shirakaba/react-nativescript.git
cd react-nativescript
git checkout "ns-6-3"

# Build a local release of React NativeScript
cd react-nativescript && npm install && npm run build

cd ../sample
npm install
tns run ios

Expected behavior

iOS app should successfully build and run.

Sample project See reproduction steps (which involve checking out the ns-6-3 branch of React NativeScript and running the sample app which I’ve just attempted to update to {N} v6.3.0).

Additional context

• Another pod install failure for 6.3.0: https://github.com/NativeScript/nativescript-cli/issues/5189
• A different MaterialComponents/Tabs issue: https://github.com/NativeScript/nativescript-cli/issues/5153
• Another different MaterialComponents/Tabs issue: https://github.com/NativeScript/NativeScript/issues/7928

[rosen-vladimirov]

Hey @shirakaba , It seems you’ve not executed pod repo update - can you execute this command and try tns prepare ios again?

[shirakaba]

@rosen-vladimirov It woooorks! Fastest issue turnaround ever 😆🙇‍♂️ thanks for responding at this time of night, in the holiday season, on a weekend no less!

A very Merry Christmas to you, and I have a beer with your name on it on the day we cross paths! 🎄🍺🎁