import $ivy.`com.github.m50d.spray::spray-client:1.3.4`
import ammonite._, Resolvers._
val res = Resolver.Http(
  "Bintray lmm maven",
  "Some(https://dl.bintray.com/lmm/maven)",
  IvyPattern,
  false)
interp.resolvers() = interp.resolvers() :+ res

<dependency>
  <groupId>com.github.m50d.spray</groupId>
  <artifactId>spray-client_2.10</artifactId>
  <version>1.3.4</version>
</dependency>

compile group: 'com.github.m50d.spray', name: 'spray-client_2.10', version: '1.3.4'

ivy"com.github.m50d.spray::spray-client:1.3.4"
MavenRepository("https://dl.bintray.com/lmm/maven")