ionic cap sync fails on non OSX

[mueggi]

Description:
After upgrading from Capacitor 5 to 6, ionic cap sync fails on linux because it tries to run bundle exec pod install.

[capacitor] ✔ copy ios in 368.39ms
[capacitor] ✔ Updating iOS plugins in 7.48ms
[capacitor] ✖ Updating iOS native dependencies with bundle exec pod install - failed!
[capacitor] ✖ update ios - failed!
[capacitor] [error] ERR_SUBPROCESS_COMMAND_NOT_FOUND
[ERROR] An error occurred while running subprocess capacitor.

Compared to:
[capacitor] ✔ copy ios in 296.50ms
[capacitor] ✔ Updating iOS plugins in 7.73ms
[capacitor] [info] Found 16 Capacitor plugins for ios:
[capacitor] @capacitor-community/[email protected]
[capacitor] @capacitor-community/[email protected]
[capacitor] @capacitor-community/[email protected]
[capacitor] @capacitor/[email protected]
[capacitor] @capacitor/[email protected]
[capacitor] @capacitor/[email protected]
[capacitor] @capacitor/[email protected]
[capacitor] @capacitor/[email protected]
[capacitor] @capacitor/[email protected]
[capacitor] @capacitor/[email protected]
[capacitor] @capacitor/[email protected]
[capacitor] @capacitor/[email protected]
[capacitor] @newaydata/[email protected]
[capacitor] @sentry/[email protected]
[capacitor] [email protected]
[capacitor] @newaydata/[email protected]
[capacitor] [warn] Skipping pod install because CocoaPods is not installed
[capacitor] [warn] Unable to find "xcodebuild". Skipping xcodebuild clean step...
[capacitor] ✔ Updating iOS native dependencies with pod install in 4.18ms
[capacitor] ✔ update ios in 17.48ms
[capacitor] ✔ copy web in 6.86ms
[capacitor] ✔ update web in 221.97μs
[capacitor] [info] Sync finished in 0.775s

Steps to Reproduce:
Run ionic cap sync on a non OSX system.

Output:
[capacitor] ✔ copy ios in 368.39ms
[capacitor] ✔ Updating iOS plugins in 7.48ms
[capacitor] ✖ Updating iOS native dependencies with bundle exec pod install - failed!
[capacitor] ✖ update ios - failed!
[capacitor] [error] ERR_SUBPROCESS_COMMAND_NOT_FOUND
[ERROR] An error occurred while running subprocess capacitor.

My ionic info:
Ionic:

Ionic CLI : 7.2.0
Ionic Framework : @ionic/angular 8.2.6
@angular-devkit/build-angular : 17.3.8
@angular-devkit/schematics : 17.3.8
@angular/cli : 17.3.8
@ionic/angular-toolkit : 11.0.1

Capacitor:

Capacitor CLI : 6.1.2
@capacitor/android : 6.1.2
@capacitor/core : 6.1.2
@capacitor/ios : 6.1.2

Cordova:

Cordova CLI : not installed
Cordova Platforms : not available
Cordova Plugins : not available

Utility:

cordova-res : not installed globally
native-run : 2.0.1

System:

Android SDK Tools : 26.1.1 (/home/mueggler/Android/Sdk)
NodeJS : v20.16.0 (/home/mueggler/.nvm/versions/node/v20.16.0/bin/node)
npm : 10.8.1
OS : Linux 6.9

[mueggi]

Apparently, it is caused by the cocoapods dependency in the Gemfile. Why, there is a change of behaviour after the upgrade, I don't know.