Is it possible to disable sbt-web / sbt-js-engine from build.sbt in my API?

I am trying to build an API with play behind corporate firewall. The company’s Sonartype Nexus repository doesn’t have a mirror of sbt-plugin-releases yet. I have requested the team to add it but in the meantime, is it possible to disable it so that I can also ask my teammates to build without having to setup Internet proxy? From my understanding it’s a plugin for frontend functionality. My API is just a simple REST with backend and a swagger page so I don’t think it’s used.

Right now I have:

[info] welcome to sbt 1.4.9 (Oracle Corporation Java 1.8.0_112)
[info] loading settings for project project-build from plugins.sbt …
[info] loading project definition from /path/to/project
[info] Updating
[info] Resolved dependencies
[warn] Note: Some unresolved dependencies have extra attributes. Check that these dependencies exist with the requested attributes.
[warn] com.typesafe.sbt:sbt-js-engine:1.2.3 (scalaVersion=2.12, sbtVersion=1.0)
[warn] com.typesafe.sbt:sbt-native-packager:1.5.2 (scalaVersion=2.12, sbtVersion=1.0)
[warn] com.lightbend.sbt:sbt-javaagent:0.1.5 (scalaVersion=2.12, sbtVersion=1.0)
[warn] com.typesafe.sbt:sbt-twirl:1.5.1 (scalaVersion=2.12, sbtVersion=1.0)
[warn] com.typesafe.sbt:sbt-web:1.4.4 (scalaVersion=2.12, sbtVersion=1.0)
[warn] Note: Unresolved dependencies path:
[error] sbt.librarymanagement.ResolveException: Error downloading com.typesafe.sbt:sbt-js-engine;sbtVersion=1.0;scalaVersion=2.12:1.2.3