Error building tor-browser-89.1.1-10.5-1

Building fenix branch tor-browser-89.1.1-10.5-1 currently fails with the following error:

> Task :mozilla-lint-rules:compileKotlin
> Task :mozilla-lint-rules:compileJava NO-SOURCE
> Task :mozilla-lint-rules:processResources NO-SOURCE
> Task :mozilla-lint-rules:classes UP-TO-DATE
> Task :mozilla-lint-rules:inspectClassesForKotlinIC
> Task :mozilla-lint-rules:jar
> Task :app:prepareLintJar
> Task :app:processNightlyResources
> Task :app:compileNightlyKotlin
e: warnings found and -Werror specified
w: /var/tmp/build/fenix-a39fcc219cc9/app/src/main/java/org/mozilla/fenix/home/HomeMenu.kt: (136, 13): Variable 'experiments' is never used
w: /var/tmp/build/fenix-a39fcc219cc9/app/src/main/java/org/mozilla/fenix/home/HomeMenu.kt: (245, 13): Variable 'experiments' is never used

> Task :app:compileNightlyKotlin FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:compileNightlyKotlin'.